/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:32:40,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:32:40,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:32:40,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:32:40,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:32:40,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:32:40,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:32:40,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:32:40,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:32:40,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:32:40,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:32:40,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:32:40,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:32:40,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:32:40,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:32:40,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:32:40,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:32:40,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:32:40,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:32:40,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:32:40,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:32:40,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:32:40,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:32:40,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:32:40,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:32:40,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:32:40,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:32:40,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:32:40,555 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:32:40,568 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:32:40,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:32:40,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:32:40,571 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:32:40,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:32:40,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:32:40,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:32:40,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:32:40,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:32:40,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:32:40,572 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:32:40,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:32:40,572 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:32:40,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:32:40,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:32:40,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:32:40,573 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:32:40,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:32:40,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:32:40,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:32:40,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:32:40,574 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:32:40,574 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:32:40,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:32:40,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:32:40,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:32:40,865 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:32:40,866 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:32:40,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-05-02 20:32:40,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9854db7d1/364d4a7174754c9689fb9aef6097cc61/FLAGff88a1c59 [2021-05-02 20:32:41,312 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:32:41,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-05-02 20:32:41,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9854db7d1/364d4a7174754c9689fb9aef6097cc61/FLAGff88a1c59 [2021-05-02 20:32:41,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9854db7d1/364d4a7174754c9689fb9aef6097cc61 [2021-05-02 20:32:41,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:32:41,333 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:32:41,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:32:41,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:32:41,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:32:41,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:32:41" (1/1) ... [2021-05-02 20:32:41,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d4574bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:32:41, skipping insertion in model container [2021-05-02 20:32:41,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:32:41" (1/1) ... [2021-05-02 20:32:41,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:32:41,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:32:41,461 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2021-05-02 20:32:41,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:32:41,496 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:32:41,546 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2021-05-02 20:32:41,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:32:41,574 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:32:41,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:32:41 WrapperNode [2021-05-02 20:32:41,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:32:41,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:32:41,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:32:41,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:32:41,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:32:41" (1/1) ... [2021-05-02 20:32:41,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:32:41" (1/1) ... [2021-05-02 20:32:41,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:32:41" (1/1) ... [2021-05-02 20:32:41,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:32:41" (1/1) ... [2021-05-02 20:32:41,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:32:41" (1/1) ... [2021-05-02 20:32:41,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:32:41" (1/1) ... [2021-05-02 20:32:41,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:32:41" (1/1) ... [2021-05-02 20:32:41,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:32:41,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:32:41,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:32:41,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:32:41,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:32:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:32:41,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:32:41,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:32:41,707 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:32:41,707 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:32:41,707 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:32:41,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:32:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:32:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:32:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:32:41,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:32:41,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:32:41,708 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:32:41,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:32:41,708 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:32:41,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:32:41,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:32:41,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:32:41,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:32:41,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:32:41,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:32:41,900 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:32:41,901 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:32:41,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:32:41 BoogieIcfgContainer [2021-05-02 20:32:41,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:32:41,902 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:32:41,902 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:32:41,903 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:32:41,904 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:32:41" (1/1) ... [2021-05-02 20:32:41,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:32:41 BasicIcfg [2021-05-02 20:32:41,915 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:32:41,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:32:41,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:32:41,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:32:41,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:32:41" (1/4) ... [2021-05-02 20:32:41,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c124cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:32:41, skipping insertion in model container [2021-05-02 20:32:41,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:32:41" (2/4) ... [2021-05-02 20:32:41,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c124cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:32:41, skipping insertion in model container [2021-05-02 20:32:41,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:32:41" (3/4) ... [2021-05-02 20:32:41,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c124cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:32:41, skipping insertion in model container [2021-05-02 20:32:41,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:32:41" (4/4) ... [2021-05-02 20:32:41,920 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.cJordan [2021-05-02 20:32:41,923 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:32:41,925 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:32:41,936 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:32:41,947 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:32:41,947 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:32:41,947 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:32:41,947 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:32:41,947 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:32:41,947 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:32:41,948 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:32:41,948 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:32:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:32:41,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:32:41,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:41,960 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:41,960 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2021-05-02 20:32:41,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:41,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105661724] [2021-05-02 20:32:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:42,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:32:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:42,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:32:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:42,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:32:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:32:42,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:42,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105661724] [2021-05-02 20:32:42,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105661724] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:32:42,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:32:42,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:32:42,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975991258] [2021-05-02 20:32:42,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:32:42,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:42,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:32:42,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:32:42,134 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:42,217 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-05-02 20:32:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:32:42,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 20:32:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:42,223 INFO L225 Difference]: With dead ends: 41 [2021-05-02 20:32:42,223 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 20:32:42,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:32:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 20:32:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 20:32:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:32:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-02 20:32:42,245 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-02 20:32:42,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:42,245 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-02 20:32:42,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-02 20:32:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:32:42,246 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:42,246 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:42,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:32:42,247 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:42,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:42,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2021-05-02 20:32:42,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:42,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808138411] [2021-05-02 20:32:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:42,263 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:42,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539280090] [2021-05-02 20:32:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:32:42,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:42,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:42,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:42,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:42,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:42,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:32:42,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:42,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808138411] [2021-05-02 20:32:42,472 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:42,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539280090] [2021-05-02 20:32:42,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539280090] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:32:42,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:32:42,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:32:42,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984924620] [2021-05-02 20:32:42,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:32:42,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:42,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:32:42,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:32:42,474 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:42,483 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-02 20:32:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:32:42,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:32:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:42,484 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:32:42,484 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 20:32:42,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:32:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 20:32:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 20:32:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:32:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-02 20:32:42,489 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-02 20:32:42,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:42,489 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-02 20:32:42,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:42,490 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-02 20:32:42,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 20:32:42,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:42,490 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:42,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:32:42,697 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:42,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:42,698 INFO L82 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2021-05-02 20:32:42,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:42,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380717577] [2021-05-02 20:32:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:42,709 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:42,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95522479] [2021-05-02 20:32:42,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:42,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:32:42,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:42,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:32:42,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:42,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380717577] [2021-05-02 20:32:42,819 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:42,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95522479] [2021-05-02 20:32:42,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95522479] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:32:42,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:32:42,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:32:42,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937754482] [2021-05-02 20:32:42,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:32:42,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:42,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:32:42,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:32:42,820 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:32:42,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:42,870 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-05-02 20:32:42,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:32:42,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-02 20:32:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:42,872 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:32:42,872 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 20:32:42,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:32:42,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 20:32:42,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-02 20:32:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:32:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-02 20:32:42,877 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-02 20:32:42,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:42,877 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-02 20:32:42,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:32:42,877 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-02 20:32:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:32:42,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:42,878 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:43,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:43,094 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:43,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:43,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2021-05-02 20:32:43,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:43,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220765508] [2021-05-02 20:32:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:43,120 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:43,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710997887] [2021-05-02 20:32:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:43,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:32:43,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:43,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:32:43,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:43,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220765508] [2021-05-02 20:32:43,267 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:43,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710997887] [2021-05-02 20:32:43,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710997887] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:32:43,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:32:43,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:32:43,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009119846] [2021-05-02 20:32:43,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:32:43,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:43,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:32:43,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:32:43,268 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:43,288 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-02 20:32:43,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:32:43,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:32:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:43,289 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:32:43,289 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 20:32:43,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:32:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 20:32:43,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 20:32:43,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:32:43,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 20:32:43,292 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-02 20:32:43,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:43,292 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 20:32:43,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 20:32:43,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:32:43,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:43,293 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:43,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:43,497 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:43,498 INFO L82 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2021-05-02 20:32:43,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:43,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130049182] [2021-05-02 20:32:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:43,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:43,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96432156] [2021-05-02 20:32:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:43,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:32:43,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:43,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:32:43,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:43,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130049182] [2021-05-02 20:32:43,657 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:43,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96432156] [2021-05-02 20:32:43,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96432156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:32:43,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:32:43,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:32:43,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697881776] [2021-05-02 20:32:43,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:32:43,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:43,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:32:43,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:32:43,658 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:43,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:43,721 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2021-05-02 20:32:43,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:32:43,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:32:43,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:43,723 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:32:43,723 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:32:43,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:32:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:32:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 20:32:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:32:43,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-02 20:32:43,727 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-02 20:32:43,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:43,727 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-02 20:32:43,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-02 20:32:43,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 20:32:43,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:43,728 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:43,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:43,941 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:43,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:43,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2021-05-02 20:32:43,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:43,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331865299] [2021-05-02 20:32:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:43,990 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:43,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386917484] [2021-05-02 20:32:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:44,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:32:44,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:44,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:32:44,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:44,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331865299] [2021-05-02 20:32:44,103 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:44,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386917484] [2021-05-02 20:32:44,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386917484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:44,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:44,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:32:44,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146266982] [2021-05-02 20:32:44,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:32:44,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:44,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:32:44,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:32:44,104 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:44,130 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-05-02 20:32:44,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:32:44,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-05-02 20:32:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:44,132 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:32:44,132 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:32:44,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:32:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:32:44,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 20:32:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:32:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-02 20:32:44,136 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-02 20:32:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:44,136 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-02 20:32:44,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-02 20:32:44,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 20:32:44,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:44,137 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:44,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:32:44,352 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:44,353 INFO L82 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2021-05-02 20:32:44,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:44,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842801590] [2021-05-02 20:32:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:44,377 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:44,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504150666] [2021-05-02 20:32:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:44,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:32:44,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:44,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:32:44,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:44,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842801590] [2021-05-02 20:32:44,541 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:44,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504150666] [2021-05-02 20:32:44,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504150666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:44,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:44,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:32:44,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322356300] [2021-05-02 20:32:44,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:32:44,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:44,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:32:44,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:32:44,543 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:44,702 INFO L93 Difference]: Finished difference Result 131 states and 193 transitions. [2021-05-02 20:32:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:32:44,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-02 20:32:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:44,703 INFO L225 Difference]: With dead ends: 131 [2021-05-02 20:32:44,703 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 20:32:44,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:32:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 20:32:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-02 20:32:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:32:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-02 20:32:44,710 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-02 20:32:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:44,710 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-02 20:32:44,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-02 20:32:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:32:44,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:44,711 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:44,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:44,924 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:44,924 INFO L82 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2021-05-02 20:32:44,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:44,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326278243] [2021-05-02 20:32:44,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:44,933 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:44,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477474280] [2021-05-02 20:32:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:44,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:32:44,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:45,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:32:45,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:45,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326278243] [2021-05-02 20:32:45,066 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:45,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477474280] [2021-05-02 20:32:45,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477474280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:45,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:45,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:32:45,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088727346] [2021-05-02 20:32:45,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:32:45,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:45,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:32:45,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:32:45,067 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:32:45,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:45,135 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2021-05-02 20:32:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:32:45,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 20:32:45,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:45,136 INFO L225 Difference]: With dead ends: 93 [2021-05-02 20:32:45,136 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 20:32:45,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:32:45,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 20:32:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 20:32:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:32:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-02 20:32:45,141 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-02 20:32:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:45,141 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-02 20:32:45,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:32:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-02 20:32:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 20:32:45,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:45,142 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:45,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:45,358 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:45,359 INFO L82 PathProgramCache]: Analyzing trace with hash 541001134, now seen corresponding path program 1 times [2021-05-02 20:32:45,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:45,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141414788] [2021-05-02 20:32:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:45,367 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:45,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698567397] [2021-05-02 20:32:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:45,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:32:45,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:45,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:32:45,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:45,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141414788] [2021-05-02 20:32:45,480 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:45,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698567397] [2021-05-02 20:32:45,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698567397] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:32:45,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:32:45,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:32:45,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026923095] [2021-05-02 20:32:45,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:32:45,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:45,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:32:45,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:32:45,481 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:45,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:45,514 INFO L93 Difference]: Finished difference Result 94 states and 127 transitions. [2021-05-02 20:32:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:32:45,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-05-02 20:32:45,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:45,515 INFO L225 Difference]: With dead ends: 94 [2021-05-02 20:32:45,515 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 20:32:45,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:32:45,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 20:32:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-02 20:32:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:32:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-02 20:32:45,519 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-02 20:32:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:45,519 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-02 20:32:45,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:45,519 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-02 20:32:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:32:45,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:45,520 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:45,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:32:45,735 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:45,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1873858129, now seen corresponding path program 1 times [2021-05-02 20:32:45,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:45,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082050197] [2021-05-02 20:32:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:45,743 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:45,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579133568] [2021-05-02 20:32:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:45,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:32:45,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:45,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:32:45,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:45,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082050197] [2021-05-02 20:32:45,872 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:45,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579133568] [2021-05-02 20:32:45,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579133568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:45,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:45,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:32:45,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160599540] [2021-05-02 20:32:45,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:32:45,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:45,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:32:45,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:32:45,873 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:45,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:45,915 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2021-05-02 20:32:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:32:45,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 20:32:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:45,917 INFO L225 Difference]: With dead ends: 120 [2021-05-02 20:32:45,917 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 20:32:45,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:32:45,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 20:32:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-02 20:32:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:32:45,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-02 20:32:45,921 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-02 20:32:45,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:45,921 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-02 20:32:45,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-02 20:32:45,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:32:45,922 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:45,922 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:46,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:46,138 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:46,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:46,138 INFO L82 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2021-05-02 20:32:46,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:46,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2588354] [2021-05-02 20:32:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:46,145 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:46,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844652988] [2021-05-02 20:32:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:46,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:32:46,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:46,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:32:46,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:46,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2588354] [2021-05-02 20:32:46,312 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:46,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844652988] [2021-05-02 20:32:46,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844652988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:46,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:46,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:32:46,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722129445] [2021-05-02 20:32:46,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:32:46,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:46,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:32:46,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:32:46,313 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:46,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:46,413 INFO L93 Difference]: Finished difference Result 152 states and 206 transitions. [2021-05-02 20:32:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:32:46,414 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 20:32:46,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:46,417 INFO L225 Difference]: With dead ends: 152 [2021-05-02 20:32:46,417 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 20:32:46,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:32:46,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 20:32:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-02 20:32:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 20:32:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-02 20:32:46,427 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-02 20:32:46,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:46,427 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-02 20:32:46,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:46,427 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-02 20:32:46,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:32:46,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:46,428 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:46,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:46,645 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:46,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:46,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1011444142, now seen corresponding path program 2 times [2021-05-02 20:32:46,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:46,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745280963] [2021-05-02 20:32:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:46,651 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:46,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923820649] [2021-05-02 20:32:46,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:46,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:32:46,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:46,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:32:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:46,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:32:46,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:46,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745280963] [2021-05-02 20:32:46,820 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:46,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923820649] [2021-05-02 20:32:46,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923820649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:46,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:46,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:32:46,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646951950] [2021-05-02 20:32:46,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:32:46,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:46,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:32:46,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:32:46,823 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:46,890 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2021-05-02 20:32:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:32:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-05-02 20:32:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:46,894 INFO L225 Difference]: With dead ends: 182 [2021-05-02 20:32:46,894 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 20:32:46,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:32:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 20:32:46,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-02 20:32:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 20:32:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-02 20:32:46,911 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-02 20:32:46,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:46,911 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-02 20:32:46,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-02 20:32:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:32:46,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:46,913 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:47,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:32:47,118 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:47,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:47,118 INFO L82 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2021-05-02 20:32:47,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:47,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903145820] [2021-05-02 20:32:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:47,124 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:47,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362306437] [2021-05-02 20:32:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:47,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:32:47,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:47,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:32:47,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:47,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903145820] [2021-05-02 20:32:47,307 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:47,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362306437] [2021-05-02 20:32:47,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362306437] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:32:47,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:32:47,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:32:47,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720161741] [2021-05-02 20:32:47,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:32:47,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:47,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:32:47,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:32:47,308 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:32:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:47,405 INFO L93 Difference]: Finished difference Result 193 states and 254 transitions. [2021-05-02 20:32:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:32:47,406 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 20:32:47,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:47,407 INFO L225 Difference]: With dead ends: 193 [2021-05-02 20:32:47,407 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 20:32:47,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:32:47,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 20:32:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 20:32:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 20:32:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-02 20:32:47,412 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-02 20:32:47,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:47,413 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-02 20:32:47,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:32:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-02 20:32:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:32:47,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:47,413 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:47,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:32:47,629 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:47,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:47,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2021-05-02 20:32:47,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:47,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760148914] [2021-05-02 20:32:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:47,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:47,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809119991] [2021-05-02 20:32:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:47,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:32:47,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:47,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:32:47,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:47,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760148914] [2021-05-02 20:32:47,806 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:47,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809119991] [2021-05-02 20:32:47,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809119991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:47,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:47,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:32:47,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913821076] [2021-05-02 20:32:47,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:32:47,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:47,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:32:47,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:32:47,807 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:32:47,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:47,957 INFO L93 Difference]: Finished difference Result 198 states and 258 transitions. [2021-05-02 20:32:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:32:47,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-05-02 20:32:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:47,959 INFO L225 Difference]: With dead ends: 198 [2021-05-02 20:32:47,959 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 20:32:47,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:32:47,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 20:32:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2021-05-02 20:32:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 142 states have (on average 1.295774647887324) internal successors, (184), 144 states have internal predecessors, (184), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 20:32:47,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 256 transitions. [2021-05-02 20:32:47,964 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 256 transitions. Word has length 41 [2021-05-02 20:32:47,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:47,964 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 256 transitions. [2021-05-02 20:32:47,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:32:47,964 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 256 transitions. [2021-05-02 20:32:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 20:32:47,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:47,964 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:48,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:32:48,180 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:48,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:48,180 INFO L82 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2021-05-02 20:32:48,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:48,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108517679] [2021-05-02 20:32:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:48,186 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:48,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21607509] [2021-05-02 20:32:48,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:32:48,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:48,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 20:32:48,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:48,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108517679] [2021-05-02 20:32:48,305 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:48,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21607509] [2021-05-02 20:32:48,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21607509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:48,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:48,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:32:48,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319392766] [2021-05-02 20:32:48,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:32:48,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:48,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:32:48,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:32:48,306 INFO L87 Difference]: Start difference. First operand 196 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:32:48,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:48,360 INFO L93 Difference]: Finished difference Result 258 states and 356 transitions. [2021-05-02 20:32:48,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:32:48,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-05-02 20:32:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:48,361 INFO L225 Difference]: With dead ends: 258 [2021-05-02 20:32:48,361 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 20:32:48,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:32:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 20:32:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 230. [2021-05-02 20:32:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 155 states have (on average 1.2967741935483872) internal successors, (201), 162 states have internal predecessors, (201), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 20:32:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 313 transitions. [2021-05-02 20:32:48,368 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 313 transitions. Word has length 44 [2021-05-02 20:32:48,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:48,369 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 313 transitions. [2021-05-02 20:32:48,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:32:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 313 transitions. [2021-05-02 20:32:48,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:32:48,369 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:48,369 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:48,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:48,585 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:48,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:48,585 INFO L82 PathProgramCache]: Analyzing trace with hash -982799261, now seen corresponding path program 1 times [2021-05-02 20:32:48,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:48,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475666426] [2021-05-02 20:32:48,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:48,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:48,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494623955] [2021-05-02 20:32:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:48,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:32:48,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:48,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:32:48,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:48,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475666426] [2021-05-02 20:32:48,739 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:48,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494623955] [2021-05-02 20:32:48,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494623955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:48,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:48,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:32:48,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17896005] [2021-05-02 20:32:48,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:32:48,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:48,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:32:48,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:32:48,739 INFO L87 Difference]: Start difference. First operand 230 states and 313 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:48,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:48,799 INFO L93 Difference]: Finished difference Result 241 states and 323 transitions. [2021-05-02 20:32:48,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:32:48,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-05-02 20:32:48,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:48,801 INFO L225 Difference]: With dead ends: 241 [2021-05-02 20:32:48,801 INFO L226 Difference]: Without dead ends: 241 [2021-05-02 20:32:48,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:32:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-02 20:32:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2021-05-02 20:32:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 162 states have (on average 1.2839506172839505) internal successors, (208), 168 states have internal predecessors, (208), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 20:32:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 320 transitions. [2021-05-02 20:32:48,807 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 320 transitions. Word has length 42 [2021-05-02 20:32:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:48,807 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 320 transitions. [2021-05-02 20:32:48,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:32:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 320 transitions. [2021-05-02 20:32:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:32:48,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:48,808 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:49,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:32:49,033 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:49,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:49,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1867030118, now seen corresponding path program 2 times [2021-05-02 20:32:49,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:49,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534822198] [2021-05-02 20:32:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:49,038 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:49,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424420442] [2021-05-02 20:32:49,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:49,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:32:49,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:49,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:32:49,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:49,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 20:32:49,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:49,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534822198] [2021-05-02 20:32:49,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:49,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424420442] [2021-05-02 20:32:49,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424420442] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:32:49,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:32:49,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:32:49,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080722088] [2021-05-02 20:32:49,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:32:49,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:49,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:32:49,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:32:49,165 INFO L87 Difference]: Start difference. First operand 237 states and 320 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:32:49,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:49,229 INFO L93 Difference]: Finished difference Result 375 states and 550 transitions. [2021-05-02 20:32:49,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:32:49,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-05-02 20:32:49,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:49,234 INFO L225 Difference]: With dead ends: 375 [2021-05-02 20:32:49,234 INFO L226 Difference]: Without dead ends: 375 [2021-05-02 20:32:49,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:32:49,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-02 20:32:49,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 261. [2021-05-02 20:32:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 192 states have internal predecessors, (242), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 20:32:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 354 transitions. [2021-05-02 20:32:49,245 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 354 transitions. Word has length 43 [2021-05-02 20:32:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:49,245 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 354 transitions. [2021-05-02 20:32:49,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:32:49,245 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 354 transitions. [2021-05-02 20:32:49,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:32:49,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:49,246 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:49,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:32:49,461 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:49,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:49,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1204922772, now seen corresponding path program 1 times [2021-05-02 20:32:49,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:49,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827059864] [2021-05-02 20:32:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:49,467 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:49,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794455590] [2021-05-02 20:32:49,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:49,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:32:49,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:49,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 20:32:49,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:49,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827059864] [2021-05-02 20:32:49,630 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:49,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794455590] [2021-05-02 20:32:49,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794455590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:49,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:49,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:32:49,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401146647] [2021-05-02 20:32:49,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:32:49,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:49,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:32:49,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:32:49,631 INFO L87 Difference]: Start difference. First operand 261 states and 354 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:32:49,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:49,839 INFO L93 Difference]: Finished difference Result 335 states and 474 transitions. [2021-05-02 20:32:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:32:49,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-02 20:32:49,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:49,841 INFO L225 Difference]: With dead ends: 335 [2021-05-02 20:32:49,841 INFO L226 Difference]: Without dead ends: 335 [2021-05-02 20:32:49,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:32:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-02 20:32:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 292. [2021-05-02 20:32:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 200 states have (on average 1.315) internal successors, (263), 208 states have internal predecessors, (263), 73 states have call successors, (73), 19 states have call predecessors, (73), 18 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 20:32:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 407 transitions. [2021-05-02 20:32:49,848 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 407 transitions. Word has length 46 [2021-05-02 20:32:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:49,848 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 407 transitions. [2021-05-02 20:32:49,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:32:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 407 transitions. [2021-05-02 20:32:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 20:32:49,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:49,848 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:50,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:32:50,064 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:50,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2021-05-02 20:32:50,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:50,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652678213] [2021-05-02 20:32:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:50,070 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:50,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101683136] [2021-05-02 20:32:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:50,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 20:32:50,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:50,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:50,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:50,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:50,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:50,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:50,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:50,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:50,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:50,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:50,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:50,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:50,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:32:50,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:50,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652678213] [2021-05-02 20:32:50,429 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:50,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101683136] [2021-05-02 20:32:50,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101683136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:50,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:50,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:32:50,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942926869] [2021-05-02 20:32:50,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:32:50,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:50,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:32:50,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:32:50,430 INFO L87 Difference]: Start difference. First operand 292 states and 407 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:32:50,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:50,923 INFO L93 Difference]: Finished difference Result 323 states and 450 transitions. [2021-05-02 20:32:50,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:32:50,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2021-05-02 20:32:50,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:50,925 INFO L225 Difference]: With dead ends: 323 [2021-05-02 20:32:50,925 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 20:32:50,925 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 360.7ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:32:50,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 20:32:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2021-05-02 20:32:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 217 states have (on average 1.3133640552995391) internal successors, (285), 226 states have internal predecessors, (285), 81 states have call successors, (81), 21 states have call predecessors, (81), 20 states have return successors, (79), 71 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 20:32:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2021-05-02 20:32:50,932 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 58 [2021-05-02 20:32:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:50,933 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2021-05-02 20:32:50,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:32:50,933 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2021-05-02 20:32:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 20:32:50,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:50,933 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:51,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:51,149 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:51,150 INFO L82 PathProgramCache]: Analyzing trace with hash -80402644, now seen corresponding path program 1 times [2021-05-02 20:32:51,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:51,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406162257] [2021-05-02 20:32:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:51,155 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:51,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138062854] [2021-05-02 20:32:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:51,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:32:51,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:51,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:32:51,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:51,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406162257] [2021-05-02 20:32:51,305 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:51,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138062854] [2021-05-02 20:32:51,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138062854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:51,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:51,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:32:51,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495801767] [2021-05-02 20:32:51,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:32:51,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:51,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:32:51,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:32:51,306 INFO L87 Difference]: Start difference. First operand 319 states and 445 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:32:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:51,391 INFO L93 Difference]: Finished difference Result 376 states and 499 transitions. [2021-05-02 20:32:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:32:51,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2021-05-02 20:32:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:51,393 INFO L225 Difference]: With dead ends: 376 [2021-05-02 20:32:51,393 INFO L226 Difference]: Without dead ends: 376 [2021-05-02 20:32:51,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:32:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-02 20:32:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 363. [2021-05-02 20:32:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 249 states have (on average 1.2811244979919678) internal successors, (319), 257 states have internal predecessors, (319), 85 states have call successors, (85), 29 states have call predecessors, (85), 28 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 20:32:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 487 transitions. [2021-05-02 20:32:51,400 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 487 transitions. Word has length 63 [2021-05-02 20:32:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:51,400 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 487 transitions. [2021-05-02 20:32:51,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:32:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 487 transitions. [2021-05-02 20:32:51,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:32:51,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:51,401 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:51,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:51,616 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:51,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2021-05-02 20:32:51,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:51,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611893173] [2021-05-02 20:32:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:51,623 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:51,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947471542] [2021-05-02 20:32:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:51,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:32:51,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:51,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:32:51,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:51,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611893173] [2021-05-02 20:32:51,809 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:51,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947471542] [2021-05-02 20:32:51,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947471542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:51,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:51,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:32:51,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549796828] [2021-05-02 20:32:51,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:32:51,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:51,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:32:51,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:32:51,812 INFO L87 Difference]: Start difference. First operand 363 states and 487 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:32:51,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:51,927 INFO L93 Difference]: Finished difference Result 450 states and 586 transitions. [2021-05-02 20:32:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:32:51,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-05-02 20:32:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:51,938 INFO L225 Difference]: With dead ends: 450 [2021-05-02 20:32:51,938 INFO L226 Difference]: Without dead ends: 450 [2021-05-02 20:32:51,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:32:51,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-02 20:32:51,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 430. [2021-05-02 20:32:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 295 states have (on average 1.264406779661017) internal successors, (373), 307 states have internal predecessors, (373), 98 states have call successors, (98), 37 states have call predecessors, (98), 36 states have return successors, (95), 85 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-02 20:32:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 566 transitions. [2021-05-02 20:32:51,948 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 566 transitions. Word has length 64 [2021-05-02 20:32:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:51,948 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 566 transitions. [2021-05-02 20:32:51,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:32:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 566 transitions. [2021-05-02 20:32:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 20:32:51,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:51,949 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:52,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 20:32:52,165 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:52,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:52,165 INFO L82 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2021-05-02 20:32:52,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:52,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136622545] [2021-05-02 20:32:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:52,172 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:52,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132647946] [2021-05-02 20:32:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:52,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:32:52,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:52,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-02 20:32:52,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:52,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136622545] [2021-05-02 20:32:52,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:52,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132647946] [2021-05-02 20:32:52,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132647946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:52,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:52,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:32:52,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352064395] [2021-05-02 20:32:52,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:32:52,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:52,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:32:52,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:32:52,410 INFO L87 Difference]: Start difference. First operand 430 states and 566 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:32:52,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:52,555 INFO L93 Difference]: Finished difference Result 458 states and 602 transitions. [2021-05-02 20:32:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:32:52,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-05-02 20:32:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:52,558 INFO L225 Difference]: With dead ends: 458 [2021-05-02 20:32:52,558 INFO L226 Difference]: Without dead ends: 458 [2021-05-02 20:32:52,558 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:32:52,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-02 20:32:52,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 440. [2021-05-02 20:32:52,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 301 states have (on average 1.2624584717607974) internal successors, (380), 313 states have internal predecessors, (380), 101 states have call successors, (101), 38 states have call predecessors, (101), 37 states have return successors, (98), 88 states have call predecessors, (98), 98 states have call successors, (98) [2021-05-02 20:32:52,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 579 transitions. [2021-05-02 20:32:52,569 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 579 transitions. Word has length 67 [2021-05-02 20:32:52,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:52,569 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 579 transitions. [2021-05-02 20:32:52,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:32:52,569 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 579 transitions. [2021-05-02 20:32:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 20:32:52,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:52,570 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:52,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 20:32:52,785 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:52,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:52,785 INFO L82 PathProgramCache]: Analyzing trace with hash -28038179, now seen corresponding path program 2 times [2021-05-02 20:32:52,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:52,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254512852] [2021-05-02 20:32:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:52,792 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:52,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625442943] [2021-05-02 20:32:52,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:52,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:32:52,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:52,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:32:52,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:52,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:32:52,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:52,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254512852] [2021-05-02 20:32:52,973 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:52,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625442943] [2021-05-02 20:32:52,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625442943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:52,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:52,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:32:52,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830653133] [2021-05-02 20:32:52,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:32:52,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:52,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:32:52,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:32:52,974 INFO L87 Difference]: Start difference. First operand 440 states and 579 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:32:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:53,258 INFO L93 Difference]: Finished difference Result 776 states and 1140 transitions. [2021-05-02 20:32:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:32:53,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-05-02 20:32:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:53,261 INFO L225 Difference]: With dead ends: 776 [2021-05-02 20:32:53,261 INFO L226 Difference]: Without dead ends: 776 [2021-05-02 20:32:53,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:32:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-05-02 20:32:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 502. [2021-05-02 20:32:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 347 states have (on average 1.2881844380403458) internal successors, (447), 359 states have internal predecessors, (447), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 20:32:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 678 transitions. [2021-05-02 20:32:53,285 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 678 transitions. Word has length 65 [2021-05-02 20:32:53,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:53,285 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 678 transitions. [2021-05-02 20:32:53,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:32:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 678 transitions. [2021-05-02 20:32:53,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 20:32:53,301 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:53,301 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:53,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:53,501 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:53,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:53,502 INFO L82 PathProgramCache]: Analyzing trace with hash 695478703, now seen corresponding path program 1 times [2021-05-02 20:32:53,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:53,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744263070] [2021-05-02 20:32:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:53,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:53,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146049858] [2021-05-02 20:32:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:53,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:32:53,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:53,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:32:53,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:53,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744263070] [2021-05-02 20:32:53,696 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:53,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146049858] [2021-05-02 20:32:53,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146049858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:53,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:53,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:32:53,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143119823] [2021-05-02 20:32:53,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:32:53,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:53,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:32:53,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:32:53,697 INFO L87 Difference]: Start difference. First operand 502 states and 678 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:32:53,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:53,773 INFO L93 Difference]: Finished difference Result 504 states and 676 transitions. [2021-05-02 20:32:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:32:53,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-05-02 20:32:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:53,774 INFO L225 Difference]: With dead ends: 504 [2021-05-02 20:32:53,775 INFO L226 Difference]: Without dead ends: 504 [2021-05-02 20:32:53,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:32:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-02 20:32:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 502. [2021-05-02 20:32:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 347 states have (on average 1.2795389048991355) internal successors, (444), 359 states have internal predecessors, (444), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 20:32:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 675 transitions. [2021-05-02 20:32:53,799 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 675 transitions. Word has length 65 [2021-05-02 20:32:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:53,799 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 675 transitions. [2021-05-02 20:32:53,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:32:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 675 transitions. [2021-05-02 20:32:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:32:53,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:53,800 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:54,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 20:32:54,013 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:54,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:54,013 INFO L82 PathProgramCache]: Analyzing trace with hash -609169376, now seen corresponding path program 1 times [2021-05-02 20:32:54,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:54,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259203476] [2021-05-02 20:32:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:54,019 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:54,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201854933] [2021-05-02 20:32:54,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:54,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:32:54,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:54,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 20:32:54,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:54,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259203476] [2021-05-02 20:32:54,146 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:54,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201854933] [2021-05-02 20:32:54,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201854933] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:32:54,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:32:54,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:32:54,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596297128] [2021-05-02 20:32:54,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:32:54,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:54,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:32:54,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:32:54,147 INFO L87 Difference]: Start difference. First operand 502 states and 675 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:32:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:54,180 INFO L93 Difference]: Finished difference Result 584 states and 784 transitions. [2021-05-02 20:32:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:32:54,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-05-02 20:32:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:54,182 INFO L225 Difference]: With dead ends: 584 [2021-05-02 20:32:54,182 INFO L226 Difference]: Without dead ends: 584 [2021-05-02 20:32:54,182 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:32:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-02 20:32:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 528. [2021-05-02 20:32:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 373 states have (on average 1.2868632707774799) internal successors, (480), 379 states have internal predecessors, (480), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 20:32:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 711 transitions. [2021-05-02 20:32:54,192 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 711 transitions. Word has length 69 [2021-05-02 20:32:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:54,192 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 711 transitions. [2021-05-02 20:32:54,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:32:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 711 transitions. [2021-05-02 20:32:54,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:32:54,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:54,193 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:54,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:54,409 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:54,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:54,409 INFO L82 PathProgramCache]: Analyzing trace with hash -893000644, now seen corresponding path program 2 times [2021-05-02 20:32:54,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:54,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081413791] [2021-05-02 20:32:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:54,440 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:54,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813357470] [2021-05-02 20:32:54,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:54,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:32:54,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:54,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:32:54,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:54,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:32:54,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:54,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081413791] [2021-05-02 20:32:54,637 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:54,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813357470] [2021-05-02 20:32:54,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813357470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:54,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:54,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:32:54,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788951850] [2021-05-02 20:32:54,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:32:54,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:54,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:32:54,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:32:54,639 INFO L87 Difference]: Start difference. First operand 528 states and 711 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:32:54,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:54,751 INFO L93 Difference]: Finished difference Result 551 states and 732 transitions. [2021-05-02 20:32:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:32:54,751 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-05-02 20:32:54,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:54,753 INFO L225 Difference]: With dead ends: 551 [2021-05-02 20:32:54,753 INFO L226 Difference]: Without dead ends: 551 [2021-05-02 20:32:54,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:32:54,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-05-02 20:32:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 540. [2021-05-02 20:32:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 383 states have (on average 1.279373368146214) internal successors, (490), 386 states have internal predecessors, (490), 118 states have call successors, (118), 39 states have call predecessors, (118), 38 states have return successors, (115), 114 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-02 20:32:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 723 transitions. [2021-05-02 20:32:54,763 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 723 transitions. Word has length 69 [2021-05-02 20:32:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:54,763 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 723 transitions. [2021-05-02 20:32:54,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:32:54,763 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 723 transitions. [2021-05-02 20:32:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 20:32:54,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:54,764 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:54,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:32:54,981 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:54,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:54,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1125561725, now seen corresponding path program 2 times [2021-05-02 20:32:54,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:54,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691225434] [2021-05-02 20:32:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:54,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:54,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734876805] [2021-05-02 20:32:54,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:55,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:32:55,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:55,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:32:55,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:55,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:32:55,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:55,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691225434] [2021-05-02 20:32:55,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:55,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734876805] [2021-05-02 20:32:55,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734876805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:55,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:55,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:32:55,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066174505] [2021-05-02 20:32:55,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:32:55,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:55,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:32:55,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:32:55,173 INFO L87 Difference]: Start difference. First operand 540 states and 723 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:32:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:55,353 INFO L93 Difference]: Finished difference Result 660 states and 852 transitions. [2021-05-02 20:32:55,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:32:55,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-05-02 20:32:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:55,355 INFO L225 Difference]: With dead ends: 660 [2021-05-02 20:32:55,356 INFO L226 Difference]: Without dead ends: 660 [2021-05-02 20:32:55,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:32:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-05-02 20:32:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 627. [2021-05-02 20:32:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 441 states have (on average 1.256235827664399) internal successors, (554), 445 states have internal predecessors, (554), 135 states have call successors, (135), 51 states have call predecessors, (135), 50 states have return successors, (131), 130 states have call predecessors, (131), 131 states have call successors, (131) [2021-05-02 20:32:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 820 transitions. [2021-05-02 20:32:55,367 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 820 transitions. Word has length 70 [2021-05-02 20:32:55,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:55,368 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 820 transitions. [2021-05-02 20:32:55,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:32:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 820 transitions. [2021-05-02 20:32:55,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 20:32:55,369 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:55,369 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:55,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 20:32:55,584 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:55,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1343179262, now seen corresponding path program 1 times [2021-05-02 20:32:55,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:55,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164906581] [2021-05-02 20:32:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:55,588 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:55,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713817898] [2021-05-02 20:32:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:55,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:32:55,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:55,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:55,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:56,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:56,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:56,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:56,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:32:56,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:56,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164906581] [2021-05-02 20:32:56,248 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:56,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713817898] [2021-05-02 20:32:56,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713817898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:56,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:56,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:32:56,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095422527] [2021-05-02 20:32:56,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:32:56,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:56,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:32:56,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:32:56,249 INFO L87 Difference]: Start difference. First operand 627 states and 820 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:32:57,797 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 20:32:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:58,666 INFO L93 Difference]: Finished difference Result 798 states and 1077 transitions. [2021-05-02 20:32:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 20:32:58,666 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 70 [2021-05-02 20:32:58,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:58,668 INFO L225 Difference]: With dead ends: 798 [2021-05-02 20:32:58,669 INFO L226 Difference]: Without dead ends: 798 [2021-05-02 20:32:58,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1718.4ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 20:32:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-05-02 20:32:58,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 749. [2021-05-02 20:32:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 530 states have (on average 1.288679245283019) internal successors, (683), 534 states have internal predecessors, (683), 167 states have call successors, (167), 52 states have call predecessors, (167), 51 states have return successors, (163), 162 states have call predecessors, (163), 163 states have call successors, (163) [2021-05-02 20:32:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1013 transitions. [2021-05-02 20:32:58,682 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1013 transitions. Word has length 70 [2021-05-02 20:32:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:58,682 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1013 transitions. [2021-05-02 20:32:58,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:32:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1013 transitions. [2021-05-02 20:32:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:32:58,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:58,683 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:58,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 20:32:58,898 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:58,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1695740300, now seen corresponding path program 1 times [2021-05-02 20:32:58,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:58,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857812662] [2021-05-02 20:32:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:58,903 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:58,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889570189] [2021-05-02 20:32:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:58,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:32:58,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:58,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-02 20:32:59,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:59,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857812662] [2021-05-02 20:32:59,118 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:59,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889570189] [2021-05-02 20:32:59,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889570189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:59,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:59,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:32:59,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414916911] [2021-05-02 20:32:59,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:32:59,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:59,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:32:59,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:32:59,119 INFO L87 Difference]: Start difference. First operand 749 states and 1013 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:32:59,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:59,533 INFO L93 Difference]: Finished difference Result 1022 states and 1446 transitions. [2021-05-02 20:32:59,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:32:59,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 74 [2021-05-02 20:32:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:59,537 INFO L225 Difference]: With dead ends: 1022 [2021-05-02 20:32:59,537 INFO L226 Difference]: Without dead ends: 1022 [2021-05-02 20:32:59,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-05-02 20:32:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-05-02 20:32:59,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 779. [2021-05-02 20:32:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 545 states have (on average 1.2862385321100918) internal successors, (701), 552 states have internal predecessors, (701), 179 states have call successors, (179), 55 states have call predecessors, (179), 54 states have return successors, (175), 171 states have call predecessors, (175), 175 states have call successors, (175) [2021-05-02 20:32:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1055 transitions. [2021-05-02 20:32:59,568 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1055 transitions. Word has length 74 [2021-05-02 20:32:59,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:59,568 INFO L480 AbstractCegarLoop]: Abstraction has 779 states and 1055 transitions. [2021-05-02 20:32:59,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:32:59,568 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1055 transitions. [2021-05-02 20:32:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:32:59,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:59,568 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:59,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 20:32:59,784 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash 589974765, now seen corresponding path program 2 times [2021-05-02 20:32:59,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:59,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968325414] [2021-05-02 20:32:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:59,790 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:59,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474408774] [2021-05-02 20:32:59,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:59,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:32:59,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:59,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:32:59,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:59,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 20:32:59,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:59,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968325414] [2021-05-02 20:32:59,990 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:59,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474408774] [2021-05-02 20:32:59,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474408774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:59,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:59,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:32:59,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059117482] [2021-05-02 20:32:59,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:32:59,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:59,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:32:59,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:32:59,992 INFO L87 Difference]: Start difference. First operand 779 states and 1055 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:33:00,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:00,282 INFO L93 Difference]: Finished difference Result 976 states and 1361 transitions. [2021-05-02 20:33:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:00,282 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2021-05-02 20:33:00,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:00,285 INFO L225 Difference]: With dead ends: 976 [2021-05-02 20:33:00,285 INFO L226 Difference]: Without dead ends: 976 [2021-05-02 20:33:00,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-05-02 20:33:00,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-05-02 20:33:00,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 897. [2021-05-02 20:33:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 621 states have (on average 1.317230273752013) internal successors, (818), 628 states have internal predecessors, (818), 219 states have call successors, (219), 57 states have call predecessors, (219), 56 states have return successors, (215), 211 states have call predecessors, (215), 215 states have call successors, (215) [2021-05-02 20:33:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1252 transitions. [2021-05-02 20:33:00,301 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1252 transitions. Word has length 73 [2021-05-02 20:33:00,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:00,303 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1252 transitions. [2021-05-02 20:33:00,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:33:00,303 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1252 transitions. [2021-05-02 20:33:00,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:33:00,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:00,303 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:00,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:00,519 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:00,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:00,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 3 times [2021-05-02 20:33:00,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:00,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11552552] [2021-05-02 20:33:00,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:00,524 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:00,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249818279] [2021-05-02 20:33:00,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:00,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:33:00,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:00,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 20:33:00,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:00,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:00,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:01,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:01,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:01,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:01,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:01,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:01,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 20:33:01,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:01,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11552552] [2021-05-02 20:33:01,116 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:01,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249818279] [2021-05-02 20:33:01,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249818279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:01,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:01,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:33:01,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776715606] [2021-05-02 20:33:01,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:33:01,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:01,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:33:01,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:33:01,117 INFO L87 Difference]: Start difference. First operand 897 states and 1252 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:33:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:01,823 INFO L93 Difference]: Finished difference Result 977 states and 1362 transitions. [2021-05-02 20:33:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:33:01,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 75 [2021-05-02 20:33:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:01,826 INFO L225 Difference]: With dead ends: 977 [2021-05-02 20:33:01,826 INFO L226 Difference]: Without dead ends: 977 [2021-05-02 20:33:01,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:33:01,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-05-02 20:33:01,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 957. [2021-05-02 20:33:01,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 660 states have (on average 1.3212121212121213) internal successors, (872), 668 states have internal predecessors, (872), 236 states have call successors, (236), 61 states have call predecessors, (236), 60 states have return successors, (232), 227 states have call predecessors, (232), 232 states have call successors, (232) [2021-05-02 20:33:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1340 transitions. [2021-05-02 20:33:01,842 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1340 transitions. Word has length 75 [2021-05-02 20:33:01,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:01,843 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 1340 transitions. [2021-05-02 20:33:01,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:33:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1340 transitions. [2021-05-02 20:33:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 20:33:01,843 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:01,843 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:02,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:02,059 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:02,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1753783729, now seen corresponding path program 3 times [2021-05-02 20:33:02,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:02,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103086361] [2021-05-02 20:33:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:02,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:02,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315757469] [2021-05-02 20:33:02,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:02,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:33:02,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:02,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:02,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:02,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:02,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:02,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103086361] [2021-05-02 20:33:02,271 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:02,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315757469] [2021-05-02 20:33:02,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315757469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:02,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:02,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:02,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213453570] [2021-05-02 20:33:02,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:02,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:02,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:02,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:02,273 INFO L87 Difference]: Start difference. First operand 957 states and 1340 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:02,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:02,473 INFO L93 Difference]: Finished difference Result 1138 states and 1543 transitions. [2021-05-02 20:33:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:02,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-05-02 20:33:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:02,477 INFO L225 Difference]: With dead ends: 1138 [2021-05-02 20:33:02,477 INFO L226 Difference]: Without dead ends: 1138 [2021-05-02 20:33:02,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:02,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-05-02 20:33:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1108. [2021-05-02 20:33:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 764 states have (on average 1.2905759162303665) internal successors, (986), 773 states have internal predecessors, (986), 268 states have call successors, (268), 76 states have call predecessors, (268), 75 states have return successors, (263), 258 states have call predecessors, (263), 263 states have call successors, (263) [2021-05-02 20:33:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1517 transitions. [2021-05-02 20:33:02,496 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1517 transitions. Word has length 76 [2021-05-02 20:33:02,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:02,496 INFO L480 AbstractCegarLoop]: Abstraction has 1108 states and 1517 transitions. [2021-05-02 20:33:02,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:02,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1517 transitions. [2021-05-02 20:33:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 20:33:02,497 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:02,497 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:02,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:02,713 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1747863324, now seen corresponding path program 1 times [2021-05-02 20:33:02,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:02,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985845864] [2021-05-02 20:33:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:02,721 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:02,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906359350] [2021-05-02 20:33:02,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:02,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 20:33:02,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:02,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:02,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:03,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:03,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 20:33:03,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:03,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985845864] [2021-05-02 20:33:03,150 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:03,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906359350] [2021-05-02 20:33:03,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906359350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:03,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:03,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:33:03,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298526508] [2021-05-02 20:33:03,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:33:03,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:03,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:33:03,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:33:03,151 INFO L87 Difference]: Start difference. First operand 1108 states and 1517 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:03,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:03,849 INFO L93 Difference]: Finished difference Result 1178 states and 1611 transitions. [2021-05-02 20:33:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:33:03,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 81 [2021-05-02 20:33:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:03,853 INFO L225 Difference]: With dead ends: 1178 [2021-05-02 20:33:03,853 INFO L226 Difference]: Without dead ends: 1177 [2021-05-02 20:33:03,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-02 20:33:03,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-05-02 20:33:03,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1162. [2021-05-02 20:33:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 798 states have (on average 1.2907268170426065) internal successors, (1030), 805 states have internal predecessors, (1030), 283 states have call successors, (283), 81 states have call predecessors, (283), 80 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-05-02 20:33:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1592 transitions. [2021-05-02 20:33:03,905 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1592 transitions. Word has length 81 [2021-05-02 20:33:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:03,905 INFO L480 AbstractCegarLoop]: Abstraction has 1162 states and 1592 transitions. [2021-05-02 20:33:03,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1592 transitions. [2021-05-02 20:33:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:33:03,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:03,906 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:04,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 20:33:04,106 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:04,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:04,107 INFO L82 PathProgramCache]: Analyzing trace with hash 572886209, now seen corresponding path program 1 times [2021-05-02 20:33:04,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:04,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420050636] [2021-05-02 20:33:04,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:04,111 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:04,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176959787] [2021-05-02 20:33:04,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:04,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:33:04,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:04,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:04,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:04,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420050636] [2021-05-02 20:33:04,354 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:04,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176959787] [2021-05-02 20:33:04,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176959787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:04,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:04,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:33:04,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877558095] [2021-05-02 20:33:04,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:04,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:04,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:04,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:04,355 INFO L87 Difference]: Start difference. First operand 1162 states and 1592 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:04,518 INFO L93 Difference]: Finished difference Result 1168 states and 1593 transitions. [2021-05-02 20:33:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:33:04,519 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 20:33:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:04,522 INFO L225 Difference]: With dead ends: 1168 [2021-05-02 20:33:04,522 INFO L226 Difference]: Without dead ends: 1168 [2021-05-02 20:33:04,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:33:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-05-02 20:33:04,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1162. [2021-05-02 20:33:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 798 states have (on average 1.2882205513784462) internal successors, (1028), 805 states have internal predecessors, (1028), 283 states have call successors, (283), 81 states have call predecessors, (283), 80 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-05-02 20:33:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1590 transitions. [2021-05-02 20:33:04,542 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1590 transitions. Word has length 87 [2021-05-02 20:33:04,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:04,542 INFO L480 AbstractCegarLoop]: Abstraction has 1162 states and 1590 transitions. [2021-05-02 20:33:04,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1590 transitions. [2021-05-02 20:33:04,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 20:33:04,543 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:04,543 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:04,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:04,757 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:04,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:04,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2091636203, now seen corresponding path program 2 times [2021-05-02 20:33:04,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:04,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95867525] [2021-05-02 20:33:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:04,762 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:04,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669086904] [2021-05-02 20:33:04,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:04,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:04,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:04,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:33:04,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:04,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-02 20:33:04,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:04,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95867525] [2021-05-02 20:33:04,994 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:04,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669086904] [2021-05-02 20:33:04,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669086904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:04,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:04,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:33:04,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310342295] [2021-05-02 20:33:04,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:04,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:04,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:04,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:04,995 INFO L87 Difference]: Start difference. First operand 1162 states and 1590 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:33:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:05,232 INFO L93 Difference]: Finished difference Result 1201 states and 1640 transitions. [2021-05-02 20:33:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:33:05,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 90 [2021-05-02 20:33:05,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:05,236 INFO L225 Difference]: With dead ends: 1201 [2021-05-02 20:33:05,236 INFO L226 Difference]: Without dead ends: 1201 [2021-05-02 20:33:05,237 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:33:05,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-05-02 20:33:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1177. [2021-05-02 20:33:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 807 states have (on average 1.2862453531598512) internal successors, (1038), 814 states have internal predecessors, (1038), 287 states have call successors, (287), 83 states have call predecessors, (287), 82 states have return successors, (283), 279 states have call predecessors, (283), 283 states have call successors, (283) [2021-05-02 20:33:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1608 transitions. [2021-05-02 20:33:05,258 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1608 transitions. Word has length 90 [2021-05-02 20:33:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:05,258 INFO L480 AbstractCegarLoop]: Abstraction has 1177 states and 1608 transitions. [2021-05-02 20:33:05,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:33:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1608 transitions. [2021-05-02 20:33:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 20:33:05,259 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:05,259 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:05,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 20:33:05,476 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:05,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:05,476 INFO L82 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 2 times [2021-05-02 20:33:05,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:05,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142295627] [2021-05-02 20:33:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:05,481 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:05,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015681548] [2021-05-02 20:33:05,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:05,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:05,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:05,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 101 conjunts are in the unsatisfiable core [2021-05-02 20:33:05,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:05,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:05,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 51 proven. 42 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-05-02 20:33:06,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:06,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142295627] [2021-05-02 20:33:06,238 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:06,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015681548] [2021-05-02 20:33:06,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015681548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:06,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:06,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 20:33:06,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120245343] [2021-05-02 20:33:06,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 20:33:06,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:06,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 20:33:06,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:33:06,240 INFO L87 Difference]: Start difference. First operand 1177 states and 1608 transitions. Second operand has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 20:33:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:07,297 INFO L93 Difference]: Finished difference Result 1265 states and 1733 transitions. [2021-05-02 20:33:07,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:33:07,309 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 88 [2021-05-02 20:33:07,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:07,312 INFO L225 Difference]: With dead ends: 1265 [2021-05-02 20:33:07,313 INFO L226 Difference]: Without dead ends: 1264 [2021-05-02 20:33:07,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 746.8ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-02 20:33:07,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-05-02 20:33:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1243. [2021-05-02 20:33:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 845 states have (on average 1.2899408284023668) internal successors, (1090), 853 states have internal predecessors, (1090), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 20:33:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1708 transitions. [2021-05-02 20:33:07,337 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1708 transitions. Word has length 88 [2021-05-02 20:33:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:07,338 INFO L480 AbstractCegarLoop]: Abstraction has 1243 states and 1708 transitions. [2021-05-02 20:33:07,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 20:33:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1708 transitions. [2021-05-02 20:33:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 20:33:07,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:07,339 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:07,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:07,554 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:07,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:07,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1734422414, now seen corresponding path program 2 times [2021-05-02 20:33:07,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:07,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377189438] [2021-05-02 20:33:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:07,565 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:07,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420479402] [2021-05-02 20:33:07,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:07,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:07,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:07,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:07,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:07,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:07,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:07,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377189438] [2021-05-02 20:33:07,799 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:07,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420479402] [2021-05-02 20:33:07,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420479402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:07,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:07,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:07,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226301260] [2021-05-02 20:33:07,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:07,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:07,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:07,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:07,800 INFO L87 Difference]: Start difference. First operand 1243 states and 1708 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:07,987 INFO L93 Difference]: Finished difference Result 1273 states and 1735 transitions. [2021-05-02 20:33:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:07,987 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2021-05-02 20:33:07,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:07,990 INFO L225 Difference]: With dead ends: 1273 [2021-05-02 20:33:07,990 INFO L226 Difference]: Without dead ends: 1273 [2021-05-02 20:33:07,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-05-02 20:33:08,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1254. [2021-05-02 20:33:08,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 856 states have (on average 1.286214953271028) internal successors, (1101), 864 states have internal predecessors, (1101), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 20:33:08,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1719 transitions. [2021-05-02 20:33:08,009 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1719 transitions. Word has length 91 [2021-05-02 20:33:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:08,009 INFO L480 AbstractCegarLoop]: Abstraction has 1254 states and 1719 transitions. [2021-05-02 20:33:08,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:08,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1719 transitions. [2021-05-02 20:33:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 20:33:08,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:08,010 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:08,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 20:33:08,226 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:08,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:08,226 INFO L82 PathProgramCache]: Analyzing trace with hash 292128969, now seen corresponding path program 1 times [2021-05-02 20:33:08,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:08,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982344476] [2021-05-02 20:33:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:08,232 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:08,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766058856] [2021-05-02 20:33:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:08,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:08,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:08,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:08,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:08,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982344476] [2021-05-02 20:33:08,439 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:08,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766058856] [2021-05-02 20:33:08,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766058856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:08,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:08,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:08,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082649985] [2021-05-02 20:33:08,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:08,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:08,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:08,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:08,440 INFO L87 Difference]: Start difference. First operand 1254 states and 1719 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:08,633 INFO L93 Difference]: Finished difference Result 1280 states and 1741 transitions. [2021-05-02 20:33:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:08,633 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2021-05-02 20:33:08,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:08,637 INFO L225 Difference]: With dead ends: 1280 [2021-05-02 20:33:08,637 INFO L226 Difference]: Without dead ends: 1280 [2021-05-02 20:33:08,637 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-05-02 20:33:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1274. [2021-05-02 20:33:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 876 states have (on average 1.278538812785388) internal successors, (1120), 884 states have internal predecessors, (1120), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 20:33:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1738 transitions. [2021-05-02 20:33:08,656 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1738 transitions. Word has length 93 [2021-05-02 20:33:08,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:08,656 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 1738 transitions. [2021-05-02 20:33:08,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:08,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1738 transitions. [2021-05-02 20:33:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:33:08,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:08,657 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:08,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 20:33:08,873 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:08,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:08,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1848812608, now seen corresponding path program 2 times [2021-05-02 20:33:08,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:08,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61397283] [2021-05-02 20:33:08,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:08,878 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:08,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750915971] [2021-05-02 20:33:08,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:08,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:08,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:08,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:33:08,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:08,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:08,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-05-02 20:33:09,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:09,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61397283] [2021-05-02 20:33:09,145 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:09,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750915971] [2021-05-02 20:33:09,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750915971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:09,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:09,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:33:09,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456507196] [2021-05-02 20:33:09,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:33:09,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:09,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:33:09,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:09,147 INFO L87 Difference]: Start difference. First operand 1274 states and 1738 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:33:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:09,709 INFO L93 Difference]: Finished difference Result 1569 states and 2212 transitions. [2021-05-02 20:33:09,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 20:33:09,709 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 97 [2021-05-02 20:33:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:09,714 INFO L225 Difference]: With dead ends: 1569 [2021-05-02 20:33:09,714 INFO L226 Difference]: Without dead ends: 1569 [2021-05-02 20:33:09,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 20:33:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-05-02 20:33:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1310. [2021-05-02 20:33:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 894 states have (on average 1.2818791946308725) internal successors, (1146), 902 states have internal predecessors, (1146), 327 states have call successors, (327), 89 states have call predecessors, (327), 88 states have return successors, (323), 318 states have call predecessors, (323), 323 states have call successors, (323) [2021-05-02 20:33:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1796 transitions. [2021-05-02 20:33:09,733 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1796 transitions. Word has length 97 [2021-05-02 20:33:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:09,734 INFO L480 AbstractCegarLoop]: Abstraction has 1310 states and 1796 transitions. [2021-05-02 20:33:09,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:33:09,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1796 transitions. [2021-05-02 20:33:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:33:09,735 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:09,735 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:09,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:09,949 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:09,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:09,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2096647522, now seen corresponding path program 3 times [2021-05-02 20:33:09,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:09,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852730219] [2021-05-02 20:33:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:09,954 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:09,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956402958] [2021-05-02 20:33:09,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:10,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:33:10,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:10,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:33:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:10,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:10,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:10,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852730219] [2021-05-02 20:33:10,183 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:10,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956402958] [2021-05-02 20:33:10,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956402958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:10,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:10,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:33:10,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635782060] [2021-05-02 20:33:10,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:33:10,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:10,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:33:10,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:10,184 INFO L87 Difference]: Start difference. First operand 1310 states and 1796 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:10,413 INFO L93 Difference]: Finished difference Result 1524 states and 2039 transitions. [2021-05-02 20:33:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 20:33:10,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2021-05-02 20:33:10,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:10,417 INFO L225 Difference]: With dead ends: 1524 [2021-05-02 20:33:10,417 INFO L226 Difference]: Without dead ends: 1524 [2021-05-02 20:33:10,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:33:10,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-05-02 20:33:10,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1466. [2021-05-02 20:33:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 986 states have (on average 1.268762677484787) internal successors, (1251), 995 states have internal predecessors, (1251), 368 states have call successors, (368), 112 states have call predecessors, (368), 111 states have return successors, (363), 358 states have call predecessors, (363), 363 states have call successors, (363) [2021-05-02 20:33:10,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 1982 transitions. [2021-05-02 20:33:10,440 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 1982 transitions. Word has length 97 [2021-05-02 20:33:10,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:10,440 INFO L480 AbstractCegarLoop]: Abstraction has 1466 states and 1982 transitions. [2021-05-02 20:33:10,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:10,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 1982 transitions. [2021-05-02 20:33:10,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:33:10,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:10,441 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:10,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:10,657 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:10,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1189405093, now seen corresponding path program 4 times [2021-05-02 20:33:10,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:10,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674954196] [2021-05-02 20:33:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:10,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:10,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320278824] [2021-05-02 20:33:10,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:10,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:33:10,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:10,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 20:33:10,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:10,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:10,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 33 proven. 61 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 20:33:11,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:11,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674954196] [2021-05-02 20:33:11,384 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:11,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320278824] [2021-05-02 20:33:11,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320278824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:11,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:11,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 20:33:11,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035232770] [2021-05-02 20:33:11,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 20:33:11,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:11,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 20:33:11,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:33:11,385 INFO L87 Difference]: Start difference. First operand 1466 states and 1982 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:33:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:12,643 INFO L93 Difference]: Finished difference Result 1529 states and 2075 transitions. [2021-05-02 20:33:12,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:33:12,644 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 97 [2021-05-02 20:33:12,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:12,648 INFO L225 Difference]: With dead ends: 1529 [2021-05-02 20:33:12,648 INFO L226 Difference]: Without dead ends: 1529 [2021-05-02 20:33:12,649 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 873.7ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-05-02 20:33:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-05-02 20:33:12,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1507. [2021-05-02 20:33:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1010 states have (on average 1.2742574257425743) internal successors, (1287), 1019 states have internal predecessors, (1287), 384 states have call successors, (384), 113 states have call predecessors, (384), 112 states have return successors, (379), 374 states have call predecessors, (379), 379 states have call successors, (379) [2021-05-02 20:33:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2050 transitions. [2021-05-02 20:33:12,675 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2050 transitions. Word has length 97 [2021-05-02 20:33:12,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:12,675 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 2050 transitions. [2021-05-02 20:33:12,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:33:12,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2050 transitions. [2021-05-02 20:33:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 20:33:12,677 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:12,677 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:12,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:12,893 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash 672019267, now seen corresponding path program 3 times [2021-05-02 20:33:12,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:12,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211755683] [2021-05-02 20:33:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:12,901 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:12,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620918193] [2021-05-02 20:33:12,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:12,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 20:33:12,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 20:33:12,984 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:33:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:33:13,026 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:33:13,141 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 20:33:13,142 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 20:33:13,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 20:33:13,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:33:13 BasicIcfg [2021-05-02 20:33:13,398 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:33:13,398 INFO L168 Benchmark]: Toolchain (without parser) took 32064.74 ms. Allocated memory was 212.9 MB in the beginning and 532.7 MB in the end (delta: 319.8 MB). Free memory was 178.6 MB in the beginning and 333.2 MB in the end (delta: -154.6 MB). Peak memory consumption was 164.9 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:13,398 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 212.9 MB. Free memory is still 195.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:33:13,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.11 ms. Allocated memory is still 212.9 MB. Free memory was 178.4 MB in the beginning and 196.2 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:13,398 INFO L168 Benchmark]: Boogie Preprocessor took 33.13 ms. Allocated memory is still 212.9 MB. Free memory was 196.2 MB in the beginning and 194.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:13,398 INFO L168 Benchmark]: RCFGBuilder took 292.32 ms. Allocated memory is still 212.9 MB. Free memory was 194.1 MB in the beginning and 176.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:13,398 INFO L168 Benchmark]: IcfgTransformer took 13.43 ms. Allocated memory is still 212.9 MB. Free memory was 176.2 MB in the beginning and 174.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:13,398 INFO L168 Benchmark]: TraceAbstraction took 31481.23 ms. Allocated memory was 212.9 MB in the beginning and 532.7 MB in the end (delta: 319.8 MB). Free memory was 174.2 MB in the beginning and 333.2 MB in the end (delta: -159.1 MB). Peak memory consumption was 161.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:13,401 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 212.9 MB. Free memory is still 195.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 238.11 ms. Allocated memory is still 212.9 MB. Free memory was 178.4 MB in the beginning and 196.2 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.13 ms. Allocated memory is still 212.9 MB. Free memory was 196.2 MB in the beginning and 194.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 292.32 ms. Allocated memory is still 212.9 MB. Free memory was 194.1 MB in the beginning and 176.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.43 ms. Allocated memory is still 212.9 MB. Free memory was 176.2 MB in the beginning and 174.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 31481.23 ms. Allocated memory was 212.9 MB in the beginning and 532.7 MB in the end (delta: 319.8 MB). Free memory was 174.2 MB in the beginning and 333.2 MB in the end (delta: -159.1 MB). Peak memory consumption was 161.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=17, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=3, y=5] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=3, y=5] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=3, b=5, counter=0, p=1, q=0, r=0, s=1, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=5, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=5, c=3, counter=1, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=5, c=3, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=5, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=5, b=3, c=3, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=3, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=5, b=3, c=5, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=5, b=3, c=5, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L48] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=5, b=3, c=2, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=2, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=5, b=3, c=2, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=2, c=1, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=2, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=2, x=3, y=5] [L34] COND FALSE !(counter++<10) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 31396.7ms, OverallIterations: 42, TraceHistogramMax: 12, EmptinessCheckTime: 47.0ms, AutomataDifference: 11673.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2493 SDtfs, 3458 SDslu, 12443 SDs, 0 SdLazy, 9335 SolverSat, 2002 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5546.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2602 GetRequests, 2015 SyntacticMatches, 5 SemanticMatches, 582 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 6834.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1507occurred in iteration=41, InterpolantAutomatonStates: 543, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 524.0ms AutomataMinimizationTime, 41 MinimizatonAttempts, 1548 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 375.7ms SsaConstructionTime, 1036.7ms SatisfiabilityAnalysisTime, 7194.4ms InterpolantComputationTime, 2498 NumberOfCodeBlocks, 2441 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 2359 ConstructedInterpolants, 0 QuantifiedInterpolants, 12276 SizeOfPredicates, 240 NumberOfNonLiveVariables, 9203 ConjunctsInSsa, 955 ConjunctsInUnsatCore, 41 InterpolantComputations, 9 PerfectInterpolantSequences, 2039/2901 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...