/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/cohendiv-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:45:49,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:45:49,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:45:49,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:45:49,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:45:49,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:45:49,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:45:49,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:45:49,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:45:49,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:45:49,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:45:49,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:45:49,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:45:49,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:45:49,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:45:49,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:45:49,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:45:49,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:45:49,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:45:49,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:45:49,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:45:49,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:45:49,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:45:49,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:45:49,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:45:49,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:45:49,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:45:49,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:45:49,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:45:49,478 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:45:49,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:45:49,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:45:49,481 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:45:49,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:45:49,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:45:49,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:45:49,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:45:49,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:45:49,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:45:49,482 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:45:49,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:45:49,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:45:49,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:45:49,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:45:49,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:45:49,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:45:49,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:45:49,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:45:49,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:45:49,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:45:49,484 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:45:49,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:45:49,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:45:49,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:45:49,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:45:49,763 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:45:49,763 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:45:49,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2021-05-02 19:45:49,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c95cc806/9e78f73773df47b4b471aa7c80fd3239/FLAG1258a3600 [2021-05-02 19:45:50,214 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:45:50,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2021-05-02 19:45:50,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c95cc806/9e78f73773df47b4b471aa7c80fd3239/FLAG1258a3600 [2021-05-02 19:45:50,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c95cc806/9e78f73773df47b4b471aa7c80fd3239 [2021-05-02 19:45:50,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:45:50,235 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:45:50,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:45:50,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:45:50,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:45:50,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:45:50" (1/1) ... [2021-05-02 19:45:50,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bee3f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:50, skipping insertion in model container [2021-05-02 19:45:50,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:45:50" (1/1) ... [2021-05-02 19:45:50,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:45:50,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:45:50,394 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/cohendiv-ll_unwindbound5.c[576,589] [2021-05-02 19:45:50,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:45:50,434 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:45:50,448 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/cohendiv-ll_unwindbound5.c[576,589] [2021-05-02 19:45:50,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:45:50,474 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:45:50,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:50 WrapperNode [2021-05-02 19:45:50,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:45:50,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:45:50,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:45:50,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:45:50,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:50" (1/1) ... [2021-05-02 19:45:50,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:50" (1/1) ... [2021-05-02 19:45:50,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:50" (1/1) ... [2021-05-02 19:45:50,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:50" (1/1) ... [2021-05-02 19:45:50,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:50" (1/1) ... [2021-05-02 19:45:50,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:50" (1/1) ... [2021-05-02 19:45:50,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:50" (1/1) ... [2021-05-02 19:45:50,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:45:50,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:45:50,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:45:50,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:45:50,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:50" (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 19:45:50,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:45:50,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:45:50,570 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:45:50,570 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:45:50,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:45:50,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:45:50,570 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:45:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:45:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:45:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:45:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:45:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:45:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:45:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:45:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:45:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:45:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:45:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:45:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:45:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:45:50,760 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:45:50,760 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 19:45:50,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:45:50 BoogieIcfgContainer [2021-05-02 19:45:50,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:45:50,761 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:45:50,761 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:45:50,762 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:45:50,763 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:45:50" (1/1) ... [2021-05-02 19:45:50,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:45:50 BasicIcfg [2021-05-02 19:45:50,775 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:45:50,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:45:50,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:45:50,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:45:50,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:45:50" (1/4) ... [2021-05-02 19:45:50,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684911f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:45:50, skipping insertion in model container [2021-05-02 19:45:50,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:45:50" (2/4) ... [2021-05-02 19:45:50,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684911f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:45:50, skipping insertion in model container [2021-05-02 19:45:50,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:45:50" (3/4) ... [2021-05-02 19:45:50,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684911f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:45:50, skipping insertion in model container [2021-05-02 19:45:50,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:45:50" (4/4) ... [2021-05-02 19:45:50,788 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound5.cJordan [2021-05-02 19:45:50,795 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:45:50,797 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:45:50,821 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:45:50,842 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:45:50,843 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:45:50,843 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:45:50,843 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:45:50,843 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:45:50,843 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:45:50,843 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:45:50,843 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:45:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:45:50,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:45:50,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:50,865 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:45:50,865 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:50,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:50,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2021-05-02 19:45:50,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:50,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523070469] [2021-05-02 19:45:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:51,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:45:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:51,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:45:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:45:51,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:51,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523070469] [2021-05-02 19:45:51,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523070469] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:51,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:51,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:45:51,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454521886] [2021-05-02 19:45:51,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:45:51,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:51,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:45:51,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:45:51,147 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:45:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:51,270 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-02 19:45:51,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:45:51,271 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 19:45:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:51,276 INFO L225 Difference]: With dead ends: 39 [2021-05-02 19:45:51,276 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 19:45:51,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:45:51,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 19:45:51,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 19:45:51,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:45:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-02 19:45:51,328 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-02 19:45:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:51,328 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-02 19:45:51,328 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:45:51,329 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-02 19:45:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:45:51,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:51,330 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:45:51,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:45:51,330 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:51,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:51,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2021-05-02 19:45:51,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:51,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375622696] [2021-05-02 19:45:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:51,365 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:51,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031367169] [2021-05-02 19:45:51,365 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 19:45:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:51,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 19:45:51,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:51,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:51,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:51,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:51,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:51,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:45:51,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:51,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375622696] [2021-05-02 19:45:51,540 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:51,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031367169] [2021-05-02 19:45:51,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031367169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:51,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:51,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:45:51,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889488879] [2021-05-02 19:45:51,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:45:51,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:51,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:45:51,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:45:51,544 INFO L87 Difference]: Start difference. First operand 33 states and 42 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:45:51,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:51,564 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-02 19:45:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:45:51,565 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 19:45:51,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:51,566 INFO L225 Difference]: With dead ends: 35 [2021-05-02 19:45:51,566 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 19:45:51,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:45:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 19:45:51,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 19:45:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:45:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 19:45:51,579 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-02 19:45:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:51,580 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 19:45:51,580 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:45:51,580 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 19:45:51,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:45:51,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:51,580 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:45:51,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:45:51,785 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:51,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:51,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2021-05-02 19:45:51,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:51,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300351586] [2021-05-02 19:45:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:51,794 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:51,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452475053] [2021-05-02 19:45:51,795 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 19:45:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:51,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:45:51,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:51,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:51,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:45:51,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:51,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300351586] [2021-05-02 19:45:51,937 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:51,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452475053] [2021-05-02 19:45:51,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452475053] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:51,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:51,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:45:51,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044577925] [2021-05-02 19:45:51,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:45:51,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:51,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:45:51,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:45:51,939 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:45:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:52,020 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-02 19:45:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:45:52,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 19:45:52,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:52,021 INFO L225 Difference]: With dead ends: 43 [2021-05-02 19:45:52,021 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 19:45:52,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:45:52,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 19:45:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 19:45:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:45:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 19:45:52,026 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-02 19:45:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:52,027 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 19:45:52,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:45:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 19:45:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:45:52,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:52,027 INFO L523 BasicCegarLoop]: trace histogram [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 19:45:52,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:45:52,243 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:52,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:52,246 INFO L82 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2021-05-02 19:45:52,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:52,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912503002] [2021-05-02 19:45:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:52,255 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:52,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113136886] [2021-05-02 19:45:52,255 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 19:45:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:52,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:45:52,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:52,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:52,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:52,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:52,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:45:52,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:52,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912503002] [2021-05-02 19:45:52,425 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:52,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113136886] [2021-05-02 19:45:52,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113136886] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:52,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:52,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:45:52,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86662330] [2021-05-02 19:45:52,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:45:52,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:52,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:45:52,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:45:52,427 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 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 19:45:52,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:52,530 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-02 19:45:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:45:52,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 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 23 [2021-05-02 19:45:52,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:52,533 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:45:52,533 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 19:45:52,536 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:45:52,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 19:45:52,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 19:45:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 19:45:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-02 19:45:52,549 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-02 19:45:52,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:52,549 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-02 19:45:52,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 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 19:45:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-02 19:45:52,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 19:45:52,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:52,551 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 19:45:52,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:45:52,761 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:52,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:52,762 INFO L82 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2021-05-02 19:45:52,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:52,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120097726] [2021-05-02 19:45:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:52,771 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:52,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191471739] [2021-05-02 19:45:52,771 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 19:45:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:52,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:45:52,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:52,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:52,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:52,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:52,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:52,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:52,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:52,950 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 19:45:52,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:52,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120097726] [2021-05-02 19:45:52,950 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:52,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191471739] [2021-05-02 19:45:52,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191471739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:52,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:52,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:45:52,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7253803] [2021-05-02 19:45:52,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:45:52,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:52,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:45:52,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:45:52,952 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:45:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:53,102 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2021-05-02 19:45:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:45:53,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-05-02 19:45:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:53,104 INFO L225 Difference]: With dead ends: 81 [2021-05-02 19:45:53,104 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 19:45:53,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:45:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 19:45:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-02 19:45:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:45:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-02 19:45:53,112 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-02 19:45:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:53,112 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-02 19:45:53,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:45:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-02 19:45:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 19:45:53,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:53,113 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 19:45:53,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:45:53,314 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:53,314 INFO L82 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2021-05-02 19:45:53,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:53,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235961436] [2021-05-02 19:45:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:53,322 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:53,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358969676] [2021-05-02 19:45:53,322 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 19:45:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:53,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:45:53,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:53,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:45:53,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:53,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235961436] [2021-05-02 19:45:53,439 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:53,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358969676] [2021-05-02 19:45:53,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358969676] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:53,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:53,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 19:45:53,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104779005] [2021-05-02 19:45:53,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:45:53,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:53,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:45:53,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:45:53,440 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:45:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:53,467 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2021-05-02 19:45:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:45:53,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 19:45:53,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:53,471 INFO L225 Difference]: With dead ends: 78 [2021-05-02 19:45:53,490 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 19:45:53,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:45:53,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 19:45:53,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 19:45:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:45:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-02 19:45:53,508 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-02 19:45:53,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:53,508 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-02 19:45:53,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:45:53,508 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-02 19:45:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 19:45:53,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:53,509 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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 19:45:53,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:45:53,719 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:53,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:53,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2021-05-02 19:45:53,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:53,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918289378] [2021-05-02 19:45:53,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:53,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:53,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062748186] [2021-05-02 19:45:53,742 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 19:45:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:53,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 19:45:53,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:53,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 19:45:53,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:53,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918289378] [2021-05-02 19:45:53,900 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:53,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062748186] [2021-05-02 19:45:53,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062748186] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:45:53,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:45:53,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:45:53,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093439139] [2021-05-02 19:45:53,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:45:53,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:53,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:45:53,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:45:53,901 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:45:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:53,978 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2021-05-02 19:45:53,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:45:53,980 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 19:45:53,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:53,981 INFO L225 Difference]: With dead ends: 82 [2021-05-02 19:45:53,981 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 19:45:53,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:45:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 19:45:53,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 19:45:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:45:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-02 19:45:53,990 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-02 19:45:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:53,990 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-02 19:45:53,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:45:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-02 19:45:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 19:45:53,992 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:53,992 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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 19:45:54,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:45:54,207 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:54,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:54,207 INFO L82 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2021-05-02 19:45:54,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:54,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832921757] [2021-05-02 19:45:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:54,214 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:54,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857533082] [2021-05-02 19:45:54,215 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 19:45:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:54,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:45:54,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:54,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:45:54,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:54,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832921757] [2021-05-02 19:45:54,468 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:54,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857533082] [2021-05-02 19:45:54,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857533082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:54,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:54,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:45:54,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531588237] [2021-05-02 19:45:54,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:45:54,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:54,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:45:54,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:45:54,471 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 19:45:54,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:54,589 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-05-02 19:45:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:45:54,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 47 [2021-05-02 19:45:54,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:54,590 INFO L225 Difference]: With dead ends: 86 [2021-05-02 19:45:54,590 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 19:45:54,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:45:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 19:45:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 19:45:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:45:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-02 19:45:54,595 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-02 19:45:54,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:54,595 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-02 19:45:54,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 19:45:54,595 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-02 19:45:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 19:45:54,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:54,596 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1] [2021-05-02 19:45:54,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:45:54,805 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:54,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2021-05-02 19:45:54,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:54,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843294228] [2021-05-02 19:45:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:54,812 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:54,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609845249] [2021-05-02 19:45:54,813 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 19:45:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:54,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:45:54,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:54,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 19:45:54,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:54,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843294228] [2021-05-02 19:45:54,995 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:54,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609845249] [2021-05-02 19:45:54,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609845249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:54,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:54,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:45:54,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710507590] [2021-05-02 19:45:54,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:45:54,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:54,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:45:54,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:45:54,996 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 19:45:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:55,039 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2021-05-02 19:45:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:45:55,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-02 19:45:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:55,041 INFO L225 Difference]: With dead ends: 108 [2021-05-02 19:45:55,041 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 19:45:55,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 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 19:45:55,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 19:45:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-05-02 19:45:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:45:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-02 19:45:55,045 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 50 [2021-05-02 19:45:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:55,045 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-02 19:45:55,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 19:45:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-02 19:45:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 19:45:55,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:55,046 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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 19:45:55,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 19:45:55,261 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:55,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2021-05-02 19:45:55,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:55,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342828939] [2021-05-02 19:45:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:55,267 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:55,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669888986] [2021-05-02 19:45:55,267 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 19:45:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:55,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 19:45:55,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:55,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 19:45:55,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:55,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342828939] [2021-05-02 19:45:55,535 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:55,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669888986] [2021-05-02 19:45:55,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669888986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:55,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:55,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:45:55,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500877648] [2021-05-02 19:45:55,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:45:55,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:55,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:45:55,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:45:55,536 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:45:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:55,682 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2021-05-02 19:45:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:45:55,683 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-05-02 19:45:55,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:55,687 INFO L225 Difference]: With dead ends: 116 [2021-05-02 19:45:55,687 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 19:45:55,687 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:45:55,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 19:45:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-02 19:45:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:45:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2021-05-02 19:45:55,696 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 55 [2021-05-02 19:45:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:55,697 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2021-05-02 19:45:55,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:45:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2021-05-02 19:45:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 19:45:55,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:55,698 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1] [2021-05-02 19:45:55,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:45:55,904 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:55,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:55,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1119467195, now seen corresponding path program 1 times [2021-05-02 19:45:55,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:55,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236541116] [2021-05-02 19:45:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:55,911 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:55,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911440493] [2021-05-02 19:45:55,911 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 19:45:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:55,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:45:55,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:55,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:55,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:45:56,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:56,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236541116] [2021-05-02 19:45:56,094 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:56,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911440493] [2021-05-02 19:45:56,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911440493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:56,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:56,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:45:56,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497002506] [2021-05-02 19:45:56,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:45:56,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:56,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:45:56,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:45:56,096 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:45:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:56,136 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2021-05-02 19:45:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:45:56,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 58 [2021-05-02 19:45:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:56,140 INFO L225 Difference]: With dead ends: 106 [2021-05-02 19:45:56,140 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 19:45:56,140 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:45:56,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 19:45:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-02 19:45:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 70 states have internal predecessors, (78), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:45:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-05-02 19:45:56,146 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 58 [2021-05-02 19:45:56,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:56,147 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-05-02 19:45:56,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:45:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-05-02 19:45:56,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 19:45:56,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:56,150 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 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 19:45:56,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:45:56,371 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:56,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1669598821, now seen corresponding path program 1 times [2021-05-02 19:45:56,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:56,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194821133] [2021-05-02 19:45:56,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:56,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:56,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211546295] [2021-05-02 19:45:56,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:45:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:56,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 19:45:56,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:56,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 19:45:56,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:56,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194821133] [2021-05-02 19:45:56,550 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:56,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211546295] [2021-05-02 19:45:56,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211546295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:56,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:56,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:45:56,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574181665] [2021-05-02 19:45:56,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:45:56,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:56,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:45:56,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:45:56,552 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 19:45:56,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:56,614 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-05-02 19:45:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:45:56,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2021-05-02 19:45:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:56,615 INFO L225 Difference]: With dead ends: 128 [2021-05-02 19:45:56,615 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 19:45:56,616 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:45:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 19:45:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-05-02 19:45:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 84 states have internal predecessors, (92), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 19:45:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2021-05-02 19:45:56,620 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 74 [2021-05-02 19:45:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:56,620 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2021-05-02 19:45:56,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 19:45:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2021-05-02 19:45:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 19:45:56,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:56,621 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 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 19:45:56,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 19:45:56,837 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:56,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:56,838 INFO L82 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2021-05-02 19:45:56,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:56,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964205625] [2021-05-02 19:45:56,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:56,849 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:56,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380033516] [2021-05-02 19:45:56,850 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 19:45:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:56,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 19:45:56,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:56,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:56,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-05-02 19:45:57,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:57,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964205625] [2021-05-02 19:45:57,438 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:57,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380033516] [2021-05-02 19:45:57,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380033516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:57,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:57,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:45:57,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175710973] [2021-05-02 19:45:57,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:45:57,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:57,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:45:57,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:45:57,440 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 19:45:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:57,775 INFO L93 Difference]: Finished difference Result 156 states and 188 transitions. [2021-05-02 19:45:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:45:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 79 [2021-05-02 19:45:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:57,776 INFO L225 Difference]: With dead ends: 156 [2021-05-02 19:45:57,776 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 19:45:57,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:45:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 19:45:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-05-02 19:45:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 98 states have internal predecessors, (110), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 19:45:57,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 182 transitions. [2021-05-02 19:45:57,781 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 182 transitions. Word has length 79 [2021-05-02 19:45:57,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:57,782 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 182 transitions. [2021-05-02 19:45:57,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 19:45:57,782 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 182 transitions. [2021-05-02 19:45:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 19:45:57,782 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:57,783 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 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, 1, 1] [2021-05-02 19:45:57,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 19:45:57,998 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:57,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:57,998 INFO L82 PathProgramCache]: Analyzing trace with hash -792688430, now seen corresponding path program 2 times [2021-05-02 19:45:57,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:57,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591796801] [2021-05-02 19:45:57,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:58,003 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:58,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258149743] [2021-05-02 19:45:58,004 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 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 19:45:58,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:45:58,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:45:58,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 19:45:58,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:58,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 140 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 19:45:58,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:58,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591796801] [2021-05-02 19:45:58,184 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:58,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258149743] [2021-05-02 19:45:58,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258149743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:58,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:58,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:45:58,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944625331] [2021-05-02 19:45:58,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:45:58,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:58,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:45:58,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:45:58,185 INFO L87 Difference]: Start difference. First operand 151 states and 182 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 19:45:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:58,241 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2021-05-02 19:45:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:45:58,241 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 82 [2021-05-02 19:45:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:58,242 INFO L225 Difference]: With dead ends: 154 [2021-05-02 19:45:58,242 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 19:45:58,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:45:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 19:45:58,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-05-02 19:45:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.153061224489796) internal successors, (113), 100 states have internal predecessors, (113), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 19:45:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-05-02 19:45:58,246 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 82 [2021-05-02 19:45:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:58,246 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-05-02 19:45:58,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 19:45:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-05-02 19:45:58,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 19:45:58,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:58,247 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 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, 1, 1] [2021-05-02 19:45:58,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 19:45:58,460 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:58,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2126505818, now seen corresponding path program 1 times [2021-05-02 19:45:58,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:58,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615720600] [2021-05-02 19:45:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:58,466 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:58,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173782254] [2021-05-02 19:45:58,466 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 19:45:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:45:58,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 19:45:58,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:58,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 27 proven. 191 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-02 19:45:58,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:58,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615720600] [2021-05-02 19:45:58,665 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:58,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173782254] [2021-05-02 19:45:58,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173782254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:58,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:58,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:45:58,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961909889] [2021-05-02 19:45:58,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:45:58,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:45:58,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:45:58,667 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 19:45:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:58,760 INFO L93 Difference]: Finished difference Result 180 states and 211 transitions. [2021-05-02 19:45:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:45:58,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 90 [2021-05-02 19:45:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:58,761 INFO L225 Difference]: With dead ends: 180 [2021-05-02 19:45:58,761 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 19:45:58,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:45:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 19:45:58,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2021-05-02 19:45:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.131578947368421) internal successors, (129), 116 states have internal predecessors, (129), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 19:45:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 209 transitions. [2021-05-02 19:45:58,766 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 209 transitions. Word has length 90 [2021-05-02 19:45:58,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:58,767 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 209 transitions. [2021-05-02 19:45:58,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 19:45:58,767 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 209 transitions. [2021-05-02 19:45:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 19:45:58,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:58,767 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 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, 1, 1, 1, 1, 1] [2021-05-02 19:45:58,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:45:58,981 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash -169757262, now seen corresponding path program 2 times [2021-05-02 19:45:58,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:58,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511489346] [2021-05-02 19:45:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:58,987 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:58,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303080359] [2021-05-02 19:45:58,987 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 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 19:45:59,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:45:59,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:45:59,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 19:45:59,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:59,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 26 proven. 270 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 19:45:59,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:59,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511489346] [2021-05-02 19:45:59,175 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:59,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303080359] [2021-05-02 19:45:59,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303080359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:59,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:59,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:45:59,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575170533] [2021-05-02 19:45:59,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:45:59,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:59,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:45:59,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:45:59,176 INFO L87 Difference]: Start difference. First operand 178 states and 209 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 19:45:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:45:59,276 INFO L93 Difference]: Finished difference Result 181 states and 212 transitions. [2021-05-02 19:45:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:45:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 98 [2021-05-02 19:45:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:45:59,277 INFO L225 Difference]: With dead ends: 181 [2021-05-02 19:45:59,277 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 19:45:59,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:45:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 19:45:59,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-05-02 19:45:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 119 states have internal predecessors, (132), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 19:45:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 212 transitions. [2021-05-02 19:45:59,282 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 212 transitions. Word has length 98 [2021-05-02 19:45:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:45:59,282 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 212 transitions. [2021-05-02 19:45:59,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 19:45:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 212 transitions. [2021-05-02 19:45:59,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 19:45:59,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:45:59,283 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 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] [2021-05-02 19:45:59,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 19:45:59,497 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:45:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:45:59,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1237757564, now seen corresponding path program 2 times [2021-05-02 19:45:59,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:45:59,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983305697] [2021-05-02 19:45:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:45:59,502 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:45:59,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087489172] [2021-05-02 19:45:59,502 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 19:45:59,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:45:59,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:45:59,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:45:59,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:45:59,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 51 proven. 40 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 19:45:59,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:59,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983305697] [2021-05-02 19:45:59,842 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:59,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087489172] [2021-05-02 19:45:59,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087489172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:59,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:59,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:45:59,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049295988] [2021-05-02 19:45:59,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:45:59,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:59,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:45:59,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:45:59,845 INFO L87 Difference]: Start difference. First operand 181 states and 212 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 19:46:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:00,167 INFO L93 Difference]: Finished difference Result 214 states and 256 transitions. [2021-05-02 19:46:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:46:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 103 [2021-05-02 19:46:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:00,169 INFO L225 Difference]: With dead ends: 214 [2021-05-02 19:46:00,169 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 19:46:00,169 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:46:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 19:46:00,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2021-05-02 19:46:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 136 states have internal predecessors, (153), 50 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 19:46:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 251 transitions. [2021-05-02 19:46:00,194 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 251 transitions. Word has length 103 [2021-05-02 19:46:00,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:00,194 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 251 transitions. [2021-05-02 19:46:00,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 19:46:00,194 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 251 transitions. [2021-05-02 19:46:00,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 19:46:00,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:00,195 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 19:46:00,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 19:46:00,409 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:00,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:00,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2014256518, now seen corresponding path program 3 times [2021-05-02 19:46:00,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:00,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643362241] [2021-05-02 19:46:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:00,415 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:00,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957631859] [2021-05-02 19:46:00,415 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 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 19:46:00,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 19:46:00,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:00,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 19:46:00,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:00,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 86 proven. 36 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-05-02 19:46:00,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:00,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643362241] [2021-05-02 19:46:00,722 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:00,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957631859] [2021-05-02 19:46:00,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957631859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:00,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:00,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 19:46:00,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363189535] [2021-05-02 19:46:00,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 19:46:00,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:00,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 19:46:00,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:46:00,724 INFO L87 Difference]: Start difference. First operand 210 states and 251 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:46:07,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:07,267 INFO L93 Difference]: Finished difference Result 252 states and 298 transitions. [2021-05-02 19:46:07,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 19:46:07,268 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 106 [2021-05-02 19:46:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:07,269 INFO L225 Difference]: With dead ends: 252 [2021-05-02 19:46:07,270 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 19:46:07,270 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:46:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 19:46:07,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 235. [2021-05-02 19:46:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.105263157894737) internal successors, (168), 155 states have internal predecessors, (168), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 19:46:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 270 transitions. [2021-05-02 19:46:07,280 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 270 transitions. Word has length 106 [2021-05-02 19:46:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:07,280 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 270 transitions. [2021-05-02 19:46:07,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:46:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 270 transitions. [2021-05-02 19:46:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 19:46:07,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:07,281 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 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] [2021-05-02 19:46:07,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 19:46:07,485 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash 46832061, now seen corresponding path program 2 times [2021-05-02 19:46:07,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:07,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562687662] [2021-05-02 19:46:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:07,490 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:07,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450489091] [2021-05-02 19:46:07,490 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 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 19:46:07,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:46:07,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:07,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 19:46:07,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:07,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 102 proven. 18 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-05-02 19:46:07,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:07,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562687662] [2021-05-02 19:46:07,757 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:07,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450489091] [2021-05-02 19:46:07,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450489091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:07,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:07,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:46:07,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702884159] [2021-05-02 19:46:07,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:46:07,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:07,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:46:07,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:46:07,758 INFO L87 Difference]: Start difference. First operand 235 states and 270 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 19:46:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:07,875 INFO L93 Difference]: Finished difference Result 275 states and 331 transitions. [2021-05-02 19:46:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:46:07,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 114 [2021-05-02 19:46:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:07,876 INFO L225 Difference]: With dead ends: 275 [2021-05-02 19:46:07,876 INFO L226 Difference]: Without dead ends: 247 [2021-05-02 19:46:07,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:46:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-02 19:46:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 227. [2021-05-02 19:46:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 146 states have (on average 1.13013698630137) internal successors, (165), 150 states have internal predecessors, (165), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 19:46:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 271 transitions. [2021-05-02 19:46:07,881 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 271 transitions. Word has length 114 [2021-05-02 19:46:07,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:07,881 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 271 transitions. [2021-05-02 19:46:07,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 19:46:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 271 transitions. [2021-05-02 19:46:07,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 19:46:07,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:07,882 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 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] [2021-05-02 19:46:08,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:08,097 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:08,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1109340483, now seen corresponding path program 3 times [2021-05-02 19:46:08,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:08,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174458557] [2021-05-02 19:46:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:08,102 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:08,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470522586] [2021-05-02 19:46:08,102 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 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 19:46:08,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:46:08,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:08,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 19:46:08,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:08,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:08,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:08,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:08,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 106 proven. 18 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-05-02 19:46:08,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:08,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174458557] [2021-05-02 19:46:08,327 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:08,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470522586] [2021-05-02 19:46:08,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470522586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:08,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:08,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:46:08,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678590932] [2021-05-02 19:46:08,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:46:08,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:08,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:46:08,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:46:08,328 INFO L87 Difference]: Start difference. First operand 227 states and 271 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:46:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:10,549 INFO L93 Difference]: Finished difference Result 236 states and 281 transitions. [2021-05-02 19:46:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:46:10,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 114 [2021-05-02 19:46:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:10,551 INFO L225 Difference]: With dead ends: 236 [2021-05-02 19:46:10,551 INFO L226 Difference]: Without dead ends: 227 [2021-05-02 19:46:10,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:46:10,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-02 19:46:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2021-05-02 19:46:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 143 states have (on average 1.118881118881119) internal successors, (160), 147 states have internal predecessors, (160), 54 states have call successors, (54), 28 states have call predecessors, (54), 27 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 19:46:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 265 transitions. [2021-05-02 19:46:10,558 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 265 transitions. Word has length 114 [2021-05-02 19:46:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:10,558 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 265 transitions. [2021-05-02 19:46:10,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:46:10,558 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 265 transitions. [2021-05-02 19:46:10,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 19:46:10,559 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:10,559 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-05-02 19:46:10,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:10,774 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:10,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1953340215, now seen corresponding path program 4 times [2021-05-02 19:46:10,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:10,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055777749] [2021-05-02 19:46:10,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:10,785 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:10,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347602884] [2021-05-02 19:46:10,786 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 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 19:46:10,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:46:10,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:10,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 19:46:10,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:10,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:10,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:10,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:10,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:10,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:10,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:10,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:10,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:10,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:10,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:10,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:10,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:10,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:10,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 45 proven. 81 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 19:46:11,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:11,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055777749] [2021-05-02 19:46:11,263 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:11,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347602884] [2021-05-02 19:46:11,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347602884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:11,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:11,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 19:46:11,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214656794] [2021-05-02 19:46:11,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 19:46:11,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:11,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 19:46:11,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-02 19:46:11,265 INFO L87 Difference]: Start difference. First operand 225 states and 265 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 19:46:11,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:11,708 INFO L93 Difference]: Finished difference Result 287 states and 345 transitions. [2021-05-02 19:46:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 19:46:11,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 122 [2021-05-02 19:46:11,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:11,710 INFO L225 Difference]: With dead ends: 287 [2021-05-02 19:46:11,710 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 19:46:11,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:46:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 19:46:11,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 277. [2021-05-02 19:46:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 174 states have (on average 1.132183908045977) internal successors, (197), 178 states have internal predecessors, (197), 70 states have call successors, (70), 33 states have call predecessors, (70), 32 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-02 19:46:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 334 transitions. [2021-05-02 19:46:11,715 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 334 transitions. Word has length 122 [2021-05-02 19:46:11,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:11,715 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 334 transitions. [2021-05-02 19:46:11,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 19:46:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 334 transitions. [2021-05-02 19:46:11,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 19:46:11,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:11,716 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-02 19:46:11,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 19:46:11,932 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:11,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1409290752, now seen corresponding path program 3 times [2021-05-02 19:46:11,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:11,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978615749] [2021-05-02 19:46:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:11,943 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:11,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254577692] [2021-05-02 19:46:11,944 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 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 19:46:11,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 19:46:11,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:11,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:46:11,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:14,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 100 proven. 12 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2021-05-02 19:46:14,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:14,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978615749] [2021-05-02 19:46:14,535 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:14,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254577692] [2021-05-02 19:46:14,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254577692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:14,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:14,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:46:14,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860295196] [2021-05-02 19:46:14,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:46:14,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:14,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:46:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-05-02 19:46:14,536 INFO L87 Difference]: Start difference. First operand 277 states and 334 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 19:46:20,710 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 19:46:48,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:48,095 INFO L93 Difference]: Finished difference Result 309 states and 381 transitions. [2021-05-02 19:46:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:46:48,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2021-05-02 19:46:48,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:48,097 INFO L225 Difference]: With dead ends: 309 [2021-05-02 19:46:48,097 INFO L226 Difference]: Without dead ends: 304 [2021-05-02 19:46:48,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8526.6ms TimeCoverageRelationStatistics Valid=40, Invalid=114, Unknown=2, NotChecked=0, Total=156 [2021-05-02 19:46:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-02 19:46:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 234. [2021-05-02 19:46:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 149 states have (on average 1.1073825503355705) internal successors, (165), 154 states have internal predecessors, (165), 55 states have call successors, (55), 30 states have call predecessors, (55), 29 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 19:46:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-05-02 19:46:48,103 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 130 [2021-05-02 19:46:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:48,103 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-05-02 19:46:48,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 19:46:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-05-02 19:46:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 19:46:48,104 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:48,104 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-05-02 19:46:48,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 19:46:48,319 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:48,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:48,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1769981228, now seen corresponding path program 4 times [2021-05-02 19:46:48,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:48,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923286778] [2021-05-02 19:46:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:48,325 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:48,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251891693] [2021-05-02 19:46:48,325 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 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 19:46:48,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:46:48,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:48,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 19:46:48,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:48,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 49 proven. 103 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-05-02 19:46:48,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:48,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923286778] [2021-05-02 19:46:48,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:48,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251891693] [2021-05-02 19:46:48,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251891693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:48,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:48,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 19:46:48,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921966360] [2021-05-02 19:46:48,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 19:46:48,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:48,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 19:46:48,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-02 19:46:48,951 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 19:46:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:49,530 INFO L93 Difference]: Finished difference Result 288 states and 334 transitions. [2021-05-02 19:46:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 19:46:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) Word has length 138 [2021-05-02 19:46:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:49,532 INFO L225 Difference]: With dead ends: 288 [2021-05-02 19:46:49,532 INFO L226 Difference]: Without dead ends: 274 [2021-05-02 19:46:49,532 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 296.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-02 19:46:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-02 19:46:49,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2021-05-02 19:46:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 174 states have (on average 1.0977011494252873) internal successors, (191), 179 states have internal predecessors, (191), 61 states have call successors, (61), 35 states have call predecessors, (61), 34 states have return successors, (58), 55 states have call predecessors, (58), 58 states have call successors, (58) [2021-05-02 19:46:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 310 transitions. [2021-05-02 19:46:49,538 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 310 transitions. Word has length 138 [2021-05-02 19:46:49,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:49,539 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 310 transitions. [2021-05-02 19:46:49,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 19:46:49,539 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 310 transitions. [2021-05-02 19:46:49,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 19:46:49,540 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:49,541 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:49,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:49,754 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:49,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:49,754 INFO L82 PathProgramCache]: Analyzing trace with hash -493605665, now seen corresponding path program 5 times [2021-05-02 19:46:49,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:49,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254693819] [2021-05-02 19:46:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:49,762 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:49,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787818292] [2021-05-02 19:46:49,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 19:46:49,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-02 19:46:49,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:49,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 19:46:49,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:49,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:49,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:49,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:49,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:49,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:49,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:49,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 481 proven. 1 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 19:46:50,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:50,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254693819] [2021-05-02 19:46:50,029 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:50,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787818292] [2021-05-02 19:46:50,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787818292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:50,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:50,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:46:50,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562555396] [2021-05-02 19:46:50,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:46:50,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:50,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:46:50,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:46:50,030 INFO L87 Difference]: Start difference. First operand 270 states and 310 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 19:46:50,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:50,070 INFO L93 Difference]: Finished difference Result 268 states and 297 transitions. [2021-05-02 19:46:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:46:50,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 154 [2021-05-02 19:46:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:50,071 INFO L225 Difference]: With dead ends: 268 [2021-05-02 19:46:50,071 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 19:46:50,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:46:50,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 19:46:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-05-02 19:46:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 124 states have (on average 1.0725806451612903) internal successors, (133), 129 states have internal predecessors, (133), 43 states have call successors, (43), 27 states have call predecessors, (43), 25 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 19:46:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2021-05-02 19:46:50,086 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 154 [2021-05-02 19:46:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:50,086 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2021-05-02 19:46:50,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 19:46:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2021-05-02 19:46:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 19:46:50,087 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:50,087 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2021-05-02 19:46:50,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 19:46:50,302 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:50,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:50,302 INFO L82 PathProgramCache]: Analyzing trace with hash -604387605, now seen corresponding path program 6 times [2021-05-02 19:46:50,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:50,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666360099] [2021-05-02 19:46:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:50,310 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:50,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491006337] [2021-05-02 19:46:50,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 19:46:50,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-02 19:46:50,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:46:50,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:50,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 987 proven. 1 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 19:46:50,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:50,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666360099] [2021-05-02 19:46:50,602 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:50,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491006337] [2021-05-02 19:46:50,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491006337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:50,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:50,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:46:50,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709268407] [2021-05-02 19:46:50,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:46:50,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:50,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:46:50,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:46:50,603 INFO L87 Difference]: Start difference. First operand 193 states and 214 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 7 states have call predecessors, (25), 8 states have call successors, (25) [2021-05-02 19:46:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:50,699 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2021-05-02 19:46:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:46:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 7 states have call predecessors, (25), 8 states have call successors, (25) Word has length 162 [2021-05-02 19:46:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:50,700 INFO L225 Difference]: With dead ends: 127 [2021-05-02 19:46:50,700 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:46:50,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:46:50,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:46:50,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:46:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:46:50,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:46:50,701 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 162 [2021-05-02 19:46:50,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:50,701 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:46:50,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 7 states have call predecessors, (25), 8 states have call successors, (25) [2021-05-02 19:46:50,701 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:46:50,701 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:46:50,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:50,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:46:50 BasicIcfg [2021-05-02 19:46:50,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:46:50,917 INFO L168 Benchmark]: Toolchain (without parser) took 60681.90 ms. Allocated memory was 187.7 MB in the beginning and 314.6 MB in the end (delta: 126.9 MB). Free memory was 152.5 MB in the beginning and 189.3 MB in the end (delta: -36.9 MB). Peak memory consumption was 91.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:50,917 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 187.7 MB. Free memory is still 169.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:46:50,917 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.09 ms. Allocated memory is still 187.7 MB. Free memory was 152.3 MB in the beginning and 170.3 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:50,917 INFO L168 Benchmark]: Boogie Preprocessor took 34.15 ms. Allocated memory is still 187.7 MB. Free memory was 170.3 MB in the beginning and 168.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:50,917 INFO L168 Benchmark]: RCFGBuilder took 249.53 ms. Allocated memory is still 187.7 MB. Free memory was 168.9 MB in the beginning and 153.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:50,917 INFO L168 Benchmark]: IcfgTransformer took 13.72 ms. Allocated memory is still 187.7 MB. Free memory was 153.2 MB in the beginning and 151.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:50,917 INFO L168 Benchmark]: TraceAbstraction took 60140.46 ms. Allocated memory was 187.7 MB in the beginning and 314.6 MB in the end (delta: 126.9 MB). Free memory was 151.1 MB in the beginning and 189.3 MB in the end (delta: -38.3 MB). Peak memory consumption was 89.9 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:50,918 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 187.7 MB. Free memory is still 169.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 236.09 ms. Allocated memory is still 187.7 MB. Free memory was 152.3 MB in the beginning and 170.3 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.15 ms. Allocated memory is still 187.7 MB. Free memory was 170.3 MB in the beginning and 168.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 249.53 ms. Allocated memory is still 187.7 MB. Free memory was 168.9 MB in the beginning and 153.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.72 ms. Allocated memory is still 187.7 MB. Free memory was 153.2 MB in the beginning and 151.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 60140.46 ms. Allocated memory was 187.7 MB in the beginning and 314.6 MB in the end (delta: 126.9 MB). Free memory was 151.1 MB in the beginning and 189.3 MB in the end (delta: -38.3 MB). Peak memory consumption was 89.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 60072.2ms, OverallIterations: 25, TraceHistogramMax: 24, EmptinessCheckTime: 28.3ms, AutomataDifference: 45602.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1189 SDtfs, 765 SDslu, 4800 SDs, 0 SdLazy, 4563 SolverSat, 621 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 37802.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1981 GetRequests, 1742 SyntacticMatches, 1 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 10336.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=277occurred in iteration=21, InterpolantAutomatonStates: 249, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 202.7ms AutomataMinimizationTime, 25 MinimizatonAttempts, 138 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 235.8ms SsaConstructionTime, 629.1ms SatisfiabilityAnalysisTime, 7360.0ms InterpolantComputationTime, 1958 NumberOfCodeBlocks, 1711 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 1933 ConstructedInterpolants, 0 QuantifiedInterpolants, 7715 SizeOfPredicates, 97 NumberOfNonLiveVariables, 5261 ConjunctsInSsa, 480 ConjunctsInUnsatCore, 25 InterpolantComputations, 7 PerfectInterpolantSequences, 6441/7556 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...