/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/egcd-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:12:29,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:12:29,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:12:29,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 08:12:29,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:12:29,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:12:29,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:12:29,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:12:29,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:12:29,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:12:29,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:12:29,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:12:29,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:12:29,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:12:29,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:12:29,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:12:29,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:12:29,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:12:29,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:12:29,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:12:29,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:12:29,642 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:12:29,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:12:29,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:12:29,644 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:12:29,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:12:29,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:12:29,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:12:29,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:12:29,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:12:29,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:12:29,645 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:12:29,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:12:29,646 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:12:29,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:12:29,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:12:29,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:12:29,646 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:12:29,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:12:29,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:12:29,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:12:29,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:12:29,647 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:12:29,647 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:12:29,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:12:29,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:12:29,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:12:29,917 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:12:29,918 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:12:29,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2021-05-06 08:12:29,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2886d541/ceb867697e734ee78cbe40674c8f279a/FLAG99855d471 [2021-05-06 08:12:30,353 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:12:30,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2021-05-06 08:12:30,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2886d541/ceb867697e734ee78cbe40674c8f279a/FLAG99855d471 [2021-05-06 08:12:30,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2886d541/ceb867697e734ee78cbe40674c8f279a [2021-05-06 08:12:30,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:12:30,780 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:12:30,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:12:30,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:12:30,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:12:30,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:12:30" (1/1) ... [2021-05-06 08:12:30,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c993ab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:30, skipping insertion in model container [2021-05-06 08:12:30,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:12:30" (1/1) ... [2021-05-06 08:12:30,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:12:30,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:12:30,910 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/egcd-ll_valuebound2.c[489,502] [2021-05-06 08:12:30,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:12:30,926 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:12:30,935 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/egcd-ll_valuebound2.c[489,502] [2021-05-06 08:12:30,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:12:30,949 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:12:30,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:30 WrapperNode [2021-05-06 08:12:30,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:12:30,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:12:30,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:12:30,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:12:30,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:30" (1/1) ... [2021-05-06 08:12:30,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:30" (1/1) ... [2021-05-06 08:12:30,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:30" (1/1) ... [2021-05-06 08:12:30,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:30" (1/1) ... [2021-05-06 08:12:30,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:30" (1/1) ... [2021-05-06 08:12:30,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:30" (1/1) ... [2021-05-06 08:12:30,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:30" (1/1) ... [2021-05-06 08:12:30,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:12:30,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:12:30,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:12:30,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:12:30,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:30" (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 08:12:31,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:12:31,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:12:31,099 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:12:31,099 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:12:31,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:12:31,100 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:12:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:12:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:12:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:12:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:12:31,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:12:31,101 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:12:31,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:12:31,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:12:31,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:12:31,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:12:31,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:12:31,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:12:31,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:12:31,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:12:31,341 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:12:31,341 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:12:31,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:12:31 BoogieIcfgContainer [2021-05-06 08:12:31,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:12:31,343 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:12:31,343 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:12:31,343 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:12:31,345 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:12:31" (1/1) ... [2021-05-06 08:12:31,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:12:31 BasicIcfg [2021-05-06 08:12:31,355 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:12:31,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:12:31,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:12:31,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:12:31,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:12:30" (1/4) ... [2021-05-06 08:12:31,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a3859b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:12:31, skipping insertion in model container [2021-05-06 08:12:31,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:30" (2/4) ... [2021-05-06 08:12:31,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a3859b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:12:31, skipping insertion in model container [2021-05-06 08:12:31,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:12:31" (3/4) ... [2021-05-06 08:12:31,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a3859b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:12:31, skipping insertion in model container [2021-05-06 08:12:31,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:12:31" (4/4) ... [2021-05-06 08:12:31,360 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound2.cJordan [2021-05-06 08:12:31,380 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:12:31,383 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:12:31,393 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:12:31,412 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:12:31,412 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:12:31,412 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:12:31,412 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:12:31,412 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:12:31,412 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:12:31,412 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:12:31,412 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:12:31,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:12:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:12:31,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:31,440 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:31,440 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:31,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1381881312, now seen corresponding path program 1 times [2021-05-06 08:12:31,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:31,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652668130] [2021-05-06 08:12:31,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:31,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:12:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:31,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:12:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:31,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:12:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:31,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:12:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:31,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:12:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:12:31,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652668130] [2021-05-06 08:12:31,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652668130] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:31,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:31,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:12:31,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500671712] [2021-05-06 08:12:31,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:12:31,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:31,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:12:31,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:12:31,644 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:12:31,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:31,741 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-06 08:12:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:12:31,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:12:31,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:31,747 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:12:31,748 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:12:31,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:12:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:12:31,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:12:31,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:12:31,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 08:12:31,781 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-06 08:12:31,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:31,781 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 08:12:31,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:12:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 08:12:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:12:31,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:31,785 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:31,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:12:31,786 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:31,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1975235811, now seen corresponding path program 1 times [2021-05-06 08:12:31,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:31,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759411977] [2021-05-06 08:12:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:31,825 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:31,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203530584] [2021-05-06 08:12:31,826 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 08:12:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:31,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:12:31,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:32,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:12:32,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:32,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759411977] [2021-05-06 08:12:32,060 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:32,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203530584] [2021-05-06 08:12:32,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203530584] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:32,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:32,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:12:32,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456443915] [2021-05-06 08:12:32,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:12:32,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:32,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:12:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:12:32,062 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:12:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:32,115 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-05-06 08:12:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:12:32,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-06 08:12:32,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:32,118 INFO L225 Difference]: With dead ends: 46 [2021-05-06 08:12:32,119 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 08:12:32,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 08:12:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 08:12:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:12:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-06 08:12:32,142 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-06 08:12:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:32,143 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-06 08:12:32,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:12:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-06 08:12:32,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:12:32,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:32,145 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:32,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:12:32,353 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:32,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:32,354 INFO L82 PathProgramCache]: Analyzing trace with hash -759782395, now seen corresponding path program 1 times [2021-05-06 08:12:32,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:32,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803074213] [2021-05-06 08:12:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:32,367 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:32,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623022237] [2021-05-06 08:12:32,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:12:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:32,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:12:32,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:32,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:12:32,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:32,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803074213] [2021-05-06 08:12:32,664 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:32,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623022237] [2021-05-06 08:12:32,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623022237] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:32,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:32,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 08:12:32,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469660283] [2021-05-06 08:12:32,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:32,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:32,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:32,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:32,666 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:12:32,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:32,795 INFO L93 Difference]: Finished difference Result 68 states and 100 transitions. [2021-05-06 08:12:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:32,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2021-05-06 08:12:32,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:32,799 INFO L225 Difference]: With dead ends: 68 [2021-05-06 08:12:32,799 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 08:12:32,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 08:12:32,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 08:12:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:12:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-06 08:12:32,818 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-06 08:12:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:32,819 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-06 08:12:32,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:12:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-06 08:12:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:12:32,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:32,822 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:33,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:33,033 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:33,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:33,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1840397536, now seen corresponding path program 1 times [2021-05-06 08:12:33,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:33,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877700680] [2021-05-06 08:12:33,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:33,045 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:33,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984042793] [2021-05-06 08:12:33,046 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 08:12:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:33,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:12:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:33,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:12:33,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:33,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877700680] [2021-05-06 08:12:33,336 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:33,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984042793] [2021-05-06 08:12:33,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984042793] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:33,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:33,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 08:12:33,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069609743] [2021-05-06 08:12:33,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:33,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:33,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:33,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:33,337 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 08:12:33,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:33,437 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2021-05-06 08:12:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:33,438 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2021-05-06 08:12:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:33,438 INFO L225 Difference]: With dead ends: 66 [2021-05-06 08:12:33,438 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 08:12:33,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 08:12:33,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 08:12:33,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:12:33,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-06 08:12:33,443 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-06 08:12:33,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:33,443 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-06 08:12:33,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 08:12:33,444 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-06 08:12:33,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 08:12:33,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:33,448 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:33,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:33,667 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:33,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:33,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1590647429, now seen corresponding path program 1 times [2021-05-06 08:12:33,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:33,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724573007] [2021-05-06 08:12:33,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:33,690 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:33,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413181325] [2021-05-06 08:12:33,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:33,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:12:33,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:33,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 08:12:33,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:33,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724573007] [2021-05-06 08:12:33,810 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:33,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413181325] [2021-05-06 08:12:33,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413181325] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:33,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:33,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:12:33,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335685999] [2021-05-06 08:12:33,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:12:33,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:33,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:12:33,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:12:33,812 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 08:12:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:33,841 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-05-06 08:12:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:12:33,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-06 08:12:33,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:33,845 INFO L225 Difference]: With dead ends: 68 [2021-05-06 08:12:33,845 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 08:12:33,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 08:12:33,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 08:12:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:12:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-06 08:12:33,861 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-06 08:12:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:33,862 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-06 08:12:33,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 08:12:33,862 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-06 08:12:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 08:12:33,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:33,865 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-05-06 08:12:34,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:34,065 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:34,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:34,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1766531305, now seen corresponding path program 1 times [2021-05-06 08:12:34,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:34,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958230318] [2021-05-06 08:12:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:34,074 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:34,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230757798] [2021-05-06 08:12:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:34,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:12:34,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:34,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 08:12:34,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:34,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958230318] [2021-05-06 08:12:34,236 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:34,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230757798] [2021-05-06 08:12:34,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230757798] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:34,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:34,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:12:34,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143866184] [2021-05-06 08:12:34,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:12:34,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:34,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:12:34,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:12:34,238 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:12:34,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:34,276 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-06 08:12:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:12:34,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 08:12:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:34,277 INFO L225 Difference]: With dead ends: 82 [2021-05-06 08:12:34,277 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 08:12:34,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:34,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 08:12:34,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-06 08:12:34,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 08:12:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-06 08:12:34,288 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-06 08:12:34,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:34,288 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-06 08:12:34,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:12:34,288 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-06 08:12:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 08:12:34,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:34,290 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:34,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:12:34,501 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:34,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:34,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1046589490, now seen corresponding path program 1 times [2021-05-06 08:12:34,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:34,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941727978] [2021-05-06 08:12:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:34,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:34,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651583615] [2021-05-06 08:12:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:34,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:12:34,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:34,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:34,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:34,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:12:34,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:34,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941727978] [2021-05-06 08:12:34,669 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:34,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651583615] [2021-05-06 08:12:34,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651583615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:34,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:34,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:34,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081692188] [2021-05-06 08:12:34,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:34,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:34,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:34,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:34,670 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:34,773 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2021-05-06 08:12:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:34,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-06 08:12:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:34,774 INFO L225 Difference]: With dead ends: 86 [2021-05-06 08:12:34,774 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 08:12:34,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 08:12:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-06 08:12:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:12:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-06 08:12:34,778 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-06 08:12:34,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:34,778 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-06 08:12:34,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:34,778 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-06 08:12:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 08:12:34,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:34,779 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:34,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:34,996 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:34,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:34,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2126309122, now seen corresponding path program 1 times [2021-05-06 08:12:34,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:34,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329601556] [2021-05-06 08:12:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:35,004 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:35,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779565251] [2021-05-06 08:12:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:35,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:12:35,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:35,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 08:12:35,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:35,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329601556] [2021-05-06 08:12:35,284 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:35,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779565251] [2021-05-06 08:12:35,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779565251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:35,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:35,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:12:35,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605720376] [2021-05-06 08:12:35,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:12:35,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:35,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:12:35,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:35,285 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:12:35,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:35,419 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-06 08:12:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:12:35,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-06 08:12:35,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:35,421 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:12:35,421 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 08:12:35,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:12:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 08:12:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-06 08:12:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:12:35,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-06 08:12:35,429 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-06 08:12:35,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:35,429 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-06 08:12:35,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:12:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-06 08:12:35,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:12:35,430 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:35,430 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:35,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:35,649 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:35,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1746772058, now seen corresponding path program 2 times [2021-05-06 08:12:35,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:35,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929073619] [2021-05-06 08:12:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:35,656 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:35,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29477359] [2021-05-06 08:12:35,657 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 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 08:12:35,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:35,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:35,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 08:12:35,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:35,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:12:35,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:35,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929073619] [2021-05-06 08:12:35,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:35,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29477359] [2021-05-06 08:12:35,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29477359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:35,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:35,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:12:35,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336252772] [2021-05-06 08:12:35,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:35,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:35,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:35,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:35,942 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 11 states, 10 states have (on average 2.1) 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), 5 states have call successors, (10) [2021-05-06 08:12:36,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:36,068 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-05-06 08:12:36,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:36,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) 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), 5 states have call successors, (10) Word has length 61 [2021-05-06 08:12:36,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:36,071 INFO L225 Difference]: With dead ends: 135 [2021-05-06 08:12:36,071 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 08:12:36,072 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 08:12:36,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-06 08:12:36,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 08:12:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-06 08:12:36,080 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-06 08:12:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:36,080 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-06 08:12:36,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) 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), 5 states have call successors, (10) [2021-05-06 08:12:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-06 08:12:36,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:12:36,083 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:36,083 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:36,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:12:36,297 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:36,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:36,297 INFO L82 PathProgramCache]: Analyzing trace with hash -296466288, now seen corresponding path program 1 times [2021-05-06 08:12:36,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:36,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409815508] [2021-05-06 08:12:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:36,303 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:36,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907373327] [2021-05-06 08:12:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:36,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:12:36,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:36,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-06 08:12:36,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:36,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409815508] [2021-05-06 08:12:36,497 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:36,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907373327] [2021-05-06 08:12:36,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907373327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:36,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:36,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:36,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123936415] [2021-05-06 08:12:36,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:36,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:36,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:36,498 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:12:36,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:36,628 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2021-05-06 08:12:36,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:36,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-06 08:12:36,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:36,631 INFO L225 Difference]: With dead ends: 119 [2021-05-06 08:12:36,631 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 08:12:36,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:36,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 08:12:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-05-06 08:12:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.109375) internal successors, (71), 68 states have internal predecessors, (71), 36 states have call successors, (36), 15 states have call predecessors, (36), 14 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 08:12:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2021-05-06 08:12:36,642 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 69 [2021-05-06 08:12:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:36,643 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2021-05-06 08:12:36,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:12:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2021-05-06 08:12:36,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:12:36,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:36,657 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:36,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:36,865 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:36,865 INFO L82 PathProgramCache]: Analyzing trace with hash -392102192, now seen corresponding path program 2 times [2021-05-06 08:12:36,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:36,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184663013] [2021-05-06 08:12:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:36,872 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:36,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624640560] [2021-05-06 08:12:36,872 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 08:12:36,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:36,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:36,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:12:36,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:36,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-06 08:12:37,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:37,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184663013] [2021-05-06 08:12:37,080 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:37,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624640560] [2021-05-06 08:12:37,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624640560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:37,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:37,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:37,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783428734] [2021-05-06 08:12:37,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:37,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:37,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:37,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:37,081 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:12:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:37,157 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2021-05-06 08:12:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:37,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-06 08:12:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:37,159 INFO L225 Difference]: With dead ends: 106 [2021-05-06 08:12:37,159 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 08:12:37,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:12:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 08:12:37,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-06 08:12:37,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 64 states have internal predecessors, (66), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 08:12:37,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-05-06 08:12:37,162 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 69 [2021-05-06 08:12:37,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:37,162 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-05-06 08:12:37,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:12:37,163 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-05-06 08:12:37,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:12:37,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:37,163 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:37,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:37,364 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:37,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1674813879, now seen corresponding path program 2 times [2021-05-06 08:12:37,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:37,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187650420] [2021-05-06 08:12:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:37,370 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:37,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755245665] [2021-05-06 08:12:37,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:37,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:37,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:37,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:12:37,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:37,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-05-06 08:12:37,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:37,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187650420] [2021-05-06 08:12:37,566 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:37,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755245665] [2021-05-06 08:12:37,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755245665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:37,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:37,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:37,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940000900] [2021-05-06 08:12:37,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:37,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:37,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:37,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:37,568 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:12:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:37,649 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions. [2021-05-06 08:12:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:37,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-06 08:12:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:37,651 INFO L225 Difference]: With dead ends: 103 [2021-05-06 08:12:37,651 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 08:12:37,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 08:12:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-06 08:12:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:12:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2021-05-06 08:12:37,654 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 74 [2021-05-06 08:12:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:37,654 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2021-05-06 08:12:37,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:12:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2021-05-06 08:12:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:12:37,655 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:37,655 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:37,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:12:37,869 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:37,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:37,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1530341036, now seen corresponding path program 3 times [2021-05-06 08:12:37,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:37,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374643363] [2021-05-06 08:12:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:37,875 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:37,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809288138] [2021-05-06 08:12:37,875 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:37,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:12:37,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:37,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 08:12:37,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:37,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-05-06 08:12:38,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:38,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374643363] [2021-05-06 08:12:38,166 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:38,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809288138] [2021-05-06 08:12:38,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809288138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:38,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:38,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:12:38,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090205147] [2021-05-06 08:12:38,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:12:38,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:38,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:12:38,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:12:38,168 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:12:38,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:38,318 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2021-05-06 08:12:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:12:38,318 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 79 [2021-05-06 08:12:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:38,319 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:12:38,319 INFO L226 Difference]: Without dead ends: 112 [2021-05-06 08:12:38,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:12:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-06 08:12:38,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-06 08:12:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 66 states have internal predecessors, (69), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:12:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-05-06 08:12:38,323 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 79 [2021-05-06 08:12:38,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:38,323 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-05-06 08:12:38,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:12:38,323 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-05-06 08:12:38,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:12:38,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:38,324 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:38,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:12:38,533 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:38,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1009164330, now seen corresponding path program 3 times [2021-05-06 08:12:38,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:38,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714481619] [2021-05-06 08:12:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:38,539 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:38,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822295855] [2021-05-06 08:12:38,539 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:38,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:12:38,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:12:38,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:39,727 WARN L205 SmtUtils]: Spent 973.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-06 08:12:39,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 43 proven. 13 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-05-06 08:12:39,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:39,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714481619] [2021-05-06 08:12:39,746 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:39,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822295855] [2021-05-06 08:12:39,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822295855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:39,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:39,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:39,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627151122] [2021-05-06 08:12:39,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:39,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:39,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:39,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:39,748 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:12:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:39,878 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2021-05-06 08:12:39,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:39,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 87 [2021-05-06 08:12:39,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:39,880 INFO L225 Difference]: With dead ends: 136 [2021-05-06 08:12:39,880 INFO L226 Difference]: Without dead ends: 133 [2021-05-06 08:12:39,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1047.8ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:39,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-06 08:12:39,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2021-05-06 08:12:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.1) internal successors, (77), 74 states have internal predecessors, (77), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-06 08:12:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 160 transitions. [2021-05-06 08:12:39,887 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 160 transitions. Word has length 87 [2021-05-06 08:12:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:39,887 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 160 transitions. [2021-05-06 08:12:39,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:12:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 160 transitions. [2021-05-06 08:12:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:12:39,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:39,888 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:40,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:12:40,105 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:40,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2059609870, now seen corresponding path program 4 times [2021-05-06 08:12:40,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:40,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258493438] [2021-05-06 08:12:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:40,111 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:40,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111574116] [2021-05-06 08:12:40,111 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:40,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:12:40,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:12:40,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:40,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 66 proven. 24 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-05-06 08:12:40,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:40,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258493438] [2021-05-06 08:12:40,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:40,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111574116] [2021-05-06 08:12:40,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111574116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:40,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:40,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:40,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492752827] [2021-05-06 08:12:40,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:40,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:40,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:40,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:40,313 INFO L87 Difference]: Start difference. First operand 129 states and 160 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:12:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:40,461 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2021-05-06 08:12:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:40,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-06 08:12:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:40,462 INFO L225 Difference]: With dead ends: 82 [2021-05-06 08:12:40,462 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 08:12:40,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:12:40,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 08:12:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-05-06 08:12:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 50 states have internal predecessors, (50), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:12:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2021-05-06 08:12:40,466 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 92 [2021-05-06 08:12:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:40,468 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2021-05-06 08:12:40,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:12:40,468 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2021-05-06 08:12:40,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:12:40,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:40,469 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:40,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:40,685 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:40,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:40,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1249478606, now seen corresponding path program 4 times [2021-05-06 08:12:40,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:40,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029057119] [2021-05-06 08:12:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:40,698 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:40,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565462207] [2021-05-06 08:12:40,699 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:40,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:12:40,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:40,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:12:40,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:40,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 164 proven. 6 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-05-06 08:12:40,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:40,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029057119] [2021-05-06 08:12:40,913 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:40,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565462207] [2021-05-06 08:12:40,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565462207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:40,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:40,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:40,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394162044] [2021-05-06 08:12:40,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:40,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:40,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:40,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:40,915 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 08:12:40,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:40,986 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-06 08:12:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:40,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 97 [2021-05-06 08:12:40,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:40,986 INFO L225 Difference]: With dead ends: 52 [2021-05-06 08:12:40,986 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:12:40,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:40,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:12:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:12:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:12:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:12:40,987 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 97 [2021-05-06 08:12:40,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:40,987 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:12:40,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 08:12:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:12:40,988 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:12:41,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:12:41,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:12:41 BasicIcfg [2021-05-06 08:12:41,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:12:41,200 INFO L168 Benchmark]: Toolchain (without parser) took 10420.73 ms. Allocated memory was 183.5 MB in the beginning and 264.2 MB in the end (delta: 80.7 MB). Free memory was 149.4 MB in the beginning and 154.5 MB in the end (delta: -5.1 MB). Peak memory consumption was 76.3 MB. Max. memory is 8.0 GB. [2021-05-06 08:12:41,201 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 183.5 MB. Free memory is still 165.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:12:41,201 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.10 ms. Allocated memory is still 183.5 MB. Free memory was 149.2 MB in the beginning and 139.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:12:41,201 INFO L168 Benchmark]: Boogie Preprocessor took 39.72 ms. Allocated memory is still 183.5 MB. Free memory was 139.1 MB in the beginning and 137.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:12:41,201 INFO L168 Benchmark]: RCFGBuilder took 351.78 ms. Allocated memory is still 183.5 MB. Free memory was 137.7 MB in the beginning and 152.6 MB in the end (delta: -14.9 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. [2021-05-06 08:12:41,201 INFO L168 Benchmark]: IcfgTransformer took 12.24 ms. Allocated memory is still 183.5 MB. Free memory was 152.6 MB in the beginning and 151.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:12:41,201 INFO L168 Benchmark]: TraceAbstraction took 9844.12 ms. Allocated memory was 183.5 MB in the beginning and 264.2 MB in the end (delta: 80.7 MB). Free memory was 150.9 MB in the beginning and 154.5 MB in the end (delta: -3.6 MB). Peak memory consumption was 77.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:12:41,201 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 183.5 MB. Free memory is still 165.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 168.10 ms. Allocated memory is still 183.5 MB. Free memory was 149.2 MB in the beginning and 139.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.72 ms. Allocated memory is still 183.5 MB. Free memory was 139.1 MB in the beginning and 137.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 351.78 ms. Allocated memory is still 183.5 MB. Free memory was 137.7 MB in the beginning and 152.6 MB in the end (delta: -14.9 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.24 ms. Allocated memory is still 183.5 MB. Free memory was 152.6 MB in the beginning and 151.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9844.12 ms. Allocated memory was 183.5 MB in the beginning and 264.2 MB in the end (delta: 80.7 MB). Free memory was 150.9 MB in the beginning and 154.5 MB in the end (delta: -3.6 MB). Peak memory consumption was 77.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9786.9ms, OverallIterations: 16, TraceHistogramMax: 12, EmptinessCheckTime: 37.6ms, AutomataDifference: 1661.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 633 SDtfs, 286 SDslu, 2506 SDs, 0 SdLazy, 1563 SolverSat, 258 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 946.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 992 GetRequests, 852 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1906.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=9, InterpolantAutomatonStates: 132, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 141.1ms AutomataMinimizationTime, 16 MinimizatonAttempts, 25 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 123.1ms SsaConstructionTime, 348.9ms SatisfiabilityAnalysisTime, 3576.0ms InterpolantComputationTime, 985 NumberOfCodeBlocks, 935 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 969 ConstructedInterpolants, 0 QuantifiedInterpolants, 3286 SizeOfPredicates, 55 NumberOfNonLiveVariables, 2821 ConjunctsInSsa, 281 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 1529/1654 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...