/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/sqrt1-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:54:00,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:54:00,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:54:00,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:54:00,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:54:00,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:54:00,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:54:00,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:54:00,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:54:00,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:54:00,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:54:00,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:54:00,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:54:00,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:54:00,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:54:00,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:54:00,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:54:00,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:54:00,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:54:00,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:54:00,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:54:00,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:54:00,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:54:00,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:54:00,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:54:00,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:54:00,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:54:00,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:54:00,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:54:00,717 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:54:00,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:54:00,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:54:00,719 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:54:00,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:54:00,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:54:00,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:54:00,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:54:00,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:54:00,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:54:00,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:54:00,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:54:00,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:54:00,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:54:00,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:54:00,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:54:00,721 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:54:00,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:54:00,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:54:00,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:54:00,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:54:00,723 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:54:00,723 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:54:01,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:54:01,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:54:01,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:54:01,033 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:54:01,033 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:54:01,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound20.c [2021-05-06 10:54:01,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bca14ee7/05921a0147664095ae6dd1251a521e28/FLAG63fce935f [2021-05-06 10:54:01,456 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:54:01,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound20.c [2021-05-06 10:54:01,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bca14ee7/05921a0147664095ae6dd1251a521e28/FLAG63fce935f [2021-05-06 10:54:01,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bca14ee7/05921a0147664095ae6dd1251a521e28 [2021-05-06 10:54:01,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:54:01,482 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:54:01,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:54:01,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:54:01,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:54:01,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:54:01" (1/1) ... [2021-05-06 10:54:01,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30a71227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:01, skipping insertion in model container [2021-05-06 10:54:01,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:54:01" (1/1) ... [2021-05-06 10:54:01,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:54:01,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:54:01,625 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/sqrt1-ll_valuebound20.c[520,533] [2021-05-06 10:54:01,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:54:01,645 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:54:01,654 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/sqrt1-ll_valuebound20.c[520,533] [2021-05-06 10:54:01,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:54:01,721 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:54:01,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:01 WrapperNode [2021-05-06 10:54:01,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:54:01,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:54:01,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:54:01,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:54:01,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:01" (1/1) ... [2021-05-06 10:54:01,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:01" (1/1) ... [2021-05-06 10:54:01,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:01" (1/1) ... [2021-05-06 10:54:01,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:01" (1/1) ... [2021-05-06 10:54:01,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:01" (1/1) ... [2021-05-06 10:54:01,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:01" (1/1) ... [2021-05-06 10:54:01,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:01" (1/1) ... [2021-05-06 10:54:01,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:54:01,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:54:01,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:54:01,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:54:01,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:01" (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 [2021-05-06 10:54:01,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:54:01,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:54:01,853 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:54:01,853 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:54:01,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:54:01,853 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:54:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:54:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:54:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:54:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:54:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:54:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:54:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:54:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:54:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:54:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:54:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:54:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:54:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:54:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:54:02,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:54:02,041 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:54:02,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:54:02 BoogieIcfgContainer [2021-05-06 10:54:02,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:54:02,042 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:54:02,042 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:54:02,043 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:54:02,045 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:54:02" (1/1) ... [2021-05-06 10:54:02,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:54:02 BasicIcfg [2021-05-06 10:54:02,056 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:54:02,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:54:02,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:54:02,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:54:02,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:54:01" (1/4) ... [2021-05-06 10:54:02,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b202020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:54:02, skipping insertion in model container [2021-05-06 10:54:02,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:01" (2/4) ... [2021-05-06 10:54:02,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b202020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:54:02, skipping insertion in model container [2021-05-06 10:54:02,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:54:02" (3/4) ... [2021-05-06 10:54:02,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b202020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:54:02, skipping insertion in model container [2021-05-06 10:54:02,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:54:02" (4/4) ... [2021-05-06 10:54:02,061 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound20.cJordan [2021-05-06 10:54:02,064 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:54:02,067 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:54:02,079 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:54:02,095 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:54:02,095 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:54:02,095 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:54:02,095 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:54:02,095 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:54:02,096 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:54:02,096 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:54:02,096 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:54:02,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:54:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:54:02,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:02,110 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:02,110 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:02,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:02,114 INFO L82 PathProgramCache]: Analyzing trace with hash -179702132, now seen corresponding path program 1 times [2021-05-06 10:54:02,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:02,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965982492] [2021-05-06 10:54:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:02,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:54:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:02,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:54:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:54:02,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:02,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965982492] [2021-05-06 10:54:02,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965982492] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:54:02,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:54:02,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:54:02,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030400999] [2021-05-06 10:54:02,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:54:02,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:02,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:54:02,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:54:02,278 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2021-05-06 10:54:02,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:02,342 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-05-06 10:54:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:54:02,344 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 [2021-05-06 10:54:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:02,348 INFO L225 Difference]: With dead ends: 31 [2021-05-06 10:54:02,348 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:54:02,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:54:02,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:54:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 10:54:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:54:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-06 10:54:02,372 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-06 10:54:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:02,372 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-06 10:54:02,372 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) [2021-05-06 10:54:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-06 10:54:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:54:02,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:02,373 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:02,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:54:02,373 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1985279762, now seen corresponding path program 1 times [2021-05-06 10:54:02,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:02,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511444246] [2021-05-06 10:54:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:02,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:54:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:02,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:54:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:54:02,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:02,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511444246] [2021-05-06 10:54:02,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511444246] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:54:02,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:54:02,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 10:54:02,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654061758] [2021-05-06 10:54:02,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:54:02,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:02,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:54:02,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:02,482 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:54:02,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:02,673 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 10:54:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:54:02,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:54:02,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:02,674 INFO L225 Difference]: With dead ends: 38 [2021-05-06 10:54:02,674 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 10:54:02,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:54:02,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 10:54:02,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-06 10:54:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:54:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 10:54:02,680 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-06 10:54:02,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:02,681 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 10:54:02,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:54:02,681 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 10:54:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:54:02,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:02,681 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] [2021-05-06 10:54:02,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 10:54:02,682 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:02,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1146988413, now seen corresponding path program 1 times [2021-05-06 10:54:02,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:02,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701105209] [2021-05-06 10:54:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:02,692 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:02,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424095417] [2021-05-06 10:54:02,692 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 [2021-05-06 10:54:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:02,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:54:02,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:02,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:54:02,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:02,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701105209] [2021-05-06 10:54:02,906 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:02,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424095417] [2021-05-06 10:54:02,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424095417] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:54:02,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:54:02,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:54:02,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499398544] [2021-05-06 10:54:02,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:54:02,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:02,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:54:02,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:54:02,908 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:54:02,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:02,936 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-06 10:54:02,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:54:02,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 10:54:02,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:02,937 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:54:02,937 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 10:54:02,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:02,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 10:54:02,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 10:54:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:54:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-05-06 10:54:02,942 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2021-05-06 10:54:02,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:02,942 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-05-06 10:54:02,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:54:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-05-06 10:54:02,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 10:54:02,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:02,943 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] [2021-05-06 10:54:03,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 10:54:03,159 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:03,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:03,160 INFO L82 PathProgramCache]: Analyzing trace with hash -88951989, now seen corresponding path program 1 times [2021-05-06 10:54:03,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:03,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396365934] [2021-05-06 10:54:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:03,168 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:03,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272643932] [2021-05-06 10:54:03,168 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 [2021-05-06 10:54:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:03,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:54:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:03,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:54:03,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:03,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396365934] [2021-05-06 10:54:03,305 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:03,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272643932] [2021-05-06 10:54:03,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272643932] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:54:03,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:54:03,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:54:03,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748905056] [2021-05-06 10:54:03,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:54:03,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:03,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:54:03,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:54:03,306 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:54:03,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:03,349 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-05-06 10:54:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:54:03,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 10:54:03,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:03,350 INFO L225 Difference]: With dead ends: 46 [2021-05-06 10:54:03,350 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:54:03,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:03,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:54:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:54:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:54:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-05-06 10:54:03,354 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2021-05-06 10:54:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:03,354 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-05-06 10:54:03,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:54:03,354 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-05-06 10:54:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:54:03,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:03,355 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:03,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:03,575 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:03,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:03,575 INFO L82 PathProgramCache]: Analyzing trace with hash 196845204, now seen corresponding path program 1 times [2021-05-06 10:54:03,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:03,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202818066] [2021-05-06 10:54:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:03,583 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:03,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782415729] [2021-05-06 10:54:03,583 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 [2021-05-06 10:54:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:03,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:54:03,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:03,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:54:03,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:03,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202818066] [2021-05-06 10:54:03,764 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:03,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782415729] [2021-05-06 10:54:03,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782415729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:03,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:03,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:54:03,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173433995] [2021-05-06 10:54:03,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:54:03,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:03,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:54:03,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:03,766 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 10:54:03,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:03,813 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-06 10:54:03,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:54:03,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 10:54:03,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:03,815 INFO L225 Difference]: With dead ends: 55 [2021-05-06 10:54:03,815 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 10:54:03,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 10:54:03,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-05-06 10:54:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:54:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-05-06 10:54:03,819 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 34 [2021-05-06 10:54:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:03,819 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-05-06 10:54:03,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 10:54:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-05-06 10:54:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 10:54:03,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:03,820 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:04,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:04,040 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:04,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:04,040 INFO L82 PathProgramCache]: Analyzing trace with hash -374953577, now seen corresponding path program 2 times [2021-05-06 10:54:04,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:04,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752591923] [2021-05-06 10:54:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:04,047 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:04,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346702624] [2021-05-06 10:54:04,048 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 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 [2021-05-06 10:54:04,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:54:04,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:04,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:54:04,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:04,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:54:04,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:04,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752591923] [2021-05-06 10:54:04,228 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:04,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346702624] [2021-05-06 10:54:04,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346702624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:04,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:04,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:54:04,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344763868] [2021-05-06 10:54:04,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:54:04,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:04,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:54:04,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:04,229 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 10:54:04,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:04,295 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-05-06 10:54:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:54:04,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-06 10:54:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:04,298 INFO L225 Difference]: With dead ends: 59 [2021-05-06 10:54:04,298 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 10:54:04,298 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 10:54:04,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-05-06 10:54:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:54:04,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-05-06 10:54:04,302 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 39 [2021-05-06 10:54:04,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:04,302 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-05-06 10:54:04,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 10:54:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-05-06 10:54:04,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 10:54:04,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:04,303 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:04,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:04,525 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash -786894479, now seen corresponding path program 3 times [2021-05-06 10:54:04,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:04,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018704710] [2021-05-06 10:54:04,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:04,533 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:04,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242678428] [2021-05-06 10:54:04,533 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 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 [2021-05-06 10:54:04,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:54:04,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:04,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:54:04,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:04,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 10:54:04,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:04,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018704710] [2021-05-06 10:54:04,670 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:04,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242678428] [2021-05-06 10:54:04,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242678428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:04,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:04,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:54:04,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050790839] [2021-05-06 10:54:04,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:54:04,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:04,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:54:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:04,672 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:54:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:04,727 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-05-06 10:54:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:54:04,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 10:54:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:04,728 INFO L225 Difference]: With dead ends: 63 [2021-05-06 10:54:04,729 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 10:54:04,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 10:54:04,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 10:54:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:54:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-05-06 10:54:04,733 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 44 [2021-05-06 10:54:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:04,733 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-05-06 10:54:04,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:54:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-05-06 10:54:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 10:54:04,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:04,734 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:04,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:54:04,952 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:04,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:04,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1256212910, now seen corresponding path program 4 times [2021-05-06 10:54:04,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:04,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819384547] [2021-05-06 10:54:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:04,959 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:04,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723797994] [2021-05-06 10:54:04,959 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 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 [2021-05-06 10:54:05,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:54:05,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:05,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:54:05,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:05,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 10:54:05,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:05,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819384547] [2021-05-06 10:54:05,196 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:05,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723797994] [2021-05-06 10:54:05,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723797994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:05,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:05,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:54:05,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015672783] [2021-05-06 10:54:05,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:54:05,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:05,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:54:05,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:05,198 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 10:54:05,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:05,266 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-05-06 10:54:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:54:05,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-06 10:54:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:05,267 INFO L225 Difference]: With dead ends: 72 [2021-05-06 10:54:05,267 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 10:54:05,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:54:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 10:54:05,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-05-06 10:54:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:54:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-05-06 10:54:05,272 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 51 [2021-05-06 10:54:05,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:05,272 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-05-06 10:54:05,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 10:54:05,272 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-05-06 10:54:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 10:54:05,273 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:05,273 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:05,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:05,490 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:05,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2048057021, now seen corresponding path program 5 times [2021-05-06 10:54:05,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:05,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239740654] [2021-05-06 10:54:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:05,496 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:05,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7168391] [2021-05-06 10:54:05,497 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 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 [2021-05-06 10:54:05,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 10:54:05,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:05,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 10:54:05,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:05,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 10:54:05,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:05,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239740654] [2021-05-06 10:54:05,690 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:05,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7168391] [2021-05-06 10:54:05,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7168391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:05,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:05,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:54:05,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696646118] [2021-05-06 10:54:05,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:54:05,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:05,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:54:05,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:05,692 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 10:54:05,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:05,774 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-05-06 10:54:05,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:54:05,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-06 10:54:05,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:05,776 INFO L225 Difference]: With dead ends: 76 [2021-05-06 10:54:05,776 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 10:54:05,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:54:05,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 10:54:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-06 10:54:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.069767441860465) internal successors, (46), 45 states have internal predecessors, (46), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:54:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-05-06 10:54:05,780 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 56 [2021-05-06 10:54:05,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:05,780 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-05-06 10:54:05,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 10:54:05,780 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-05-06 10:54:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 10:54:05,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:05,781 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:06,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:06,001 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:06,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1440613387, now seen corresponding path program 6 times [2021-05-06 10:54:06,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:06,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236035218] [2021-05-06 10:54:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:06,009 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:06,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115408046] [2021-05-06 10:54:06,009 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 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 [2021-05-06 10:54:06,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 10:54:06,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:06,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 10:54:06,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:06,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 10:54:06,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:06,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236035218] [2021-05-06 10:54:06,436 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:06,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115408046] [2021-05-06 10:54:06,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115408046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:06,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:06,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:54:06,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351392952] [2021-05-06 10:54:06,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:54:06,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:06,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:54:06,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:54:06,437 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 10:54:06,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:06,618 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-05-06 10:54:06,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:54:06,618 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 10:54:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:06,619 INFO L225 Difference]: With dead ends: 84 [2021-05-06 10:54:06,619 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 10:54:06,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:54:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 10:54:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 10:54:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 10:54:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-05-06 10:54:06,622 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 61 [2021-05-06 10:54:06,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:06,623 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-05-06 10:54:06,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 10:54:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-05-06 10:54:06,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 10:54:06,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:06,623 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:06,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:54:06,845 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:06,846 INFO L82 PathProgramCache]: Analyzing trace with hash 555218388, now seen corresponding path program 7 times [2021-05-06 10:54:06,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:06,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312645509] [2021-05-06 10:54:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:06,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:06,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861413098] [2021-05-06 10:54:06,851 INFO L93 rtionOrderModulation]: Changing assertion order to 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 [2021-05-06 10:54:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:06,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:54:06,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:07,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 10:54:07,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:07,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312645509] [2021-05-06 10:54:07,065 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:07,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861413098] [2021-05-06 10:54:07,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861413098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:07,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:07,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:54:07,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104512228] [2021-05-06 10:54:07,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:54:07,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:07,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:54:07,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:54:07,066 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 10:54:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:07,147 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-05-06 10:54:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:54:07,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-05-06 10:54:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:07,148 INFO L225 Difference]: With dead ends: 89 [2021-05-06 10:54:07,148 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 10:54:07,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:54:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 10:54:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-05-06 10:54:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 53 states have internal predecessors, (54), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 10:54:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2021-05-06 10:54:07,152 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 68 [2021-05-06 10:54:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:07,152 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2021-05-06 10:54:07,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 10:54:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2021-05-06 10:54:07,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 10:54:07,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:07,153 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:07,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:07,361 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:07,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:07,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1331766697, now seen corresponding path program 8 times [2021-05-06 10:54:07,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:07,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101165829] [2021-05-06 10:54:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:07,366 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:07,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50726771] [2021-05-06 10:54:07,366 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 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 [2021-05-06 10:54:07,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:54:07,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:07,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 10:54:07,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:07,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-06 10:54:07,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:07,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101165829] [2021-05-06 10:54:07,653 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:07,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50726771] [2021-05-06 10:54:07,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50726771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:07,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:07,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:54:07,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474372907] [2021-05-06 10:54:07,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:54:07,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:07,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:54:07,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:54:07,655 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 10:54:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:07,823 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-05-06 10:54:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 10:54:07,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 73 [2021-05-06 10:54:07,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:07,825 INFO L225 Difference]: With dead ends: 93 [2021-05-06 10:54:07,825 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 10:54:07,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:54:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 10:54:07,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 10:54:07,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 56 states have internal predecessors, (57), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 10:54:07,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-06 10:54:07,828 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 73 [2021-05-06 10:54:07,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:07,829 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-06 10:54:07,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 10:54:07,829 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-06 10:54:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 10:54:07,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:07,830 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:08,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:08,048 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:08,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:08,048 INFO L82 PathProgramCache]: Analyzing trace with hash -715048783, now seen corresponding path program 9 times [2021-05-06 10:54:08,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:08,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250350890] [2021-05-06 10:54:08,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:08,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:08,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30741206] [2021-05-06 10:54:08,053 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 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 [2021-05-06 10:54:08,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 10:54:08,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:08,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 10:54:08,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:08,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:08,270 WARN L159 QuantifierPusher]: Ignoring assumption.