/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:46:52,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:46:52,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:46:52,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 19:46:52,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:46:52,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:46:52,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:46:52,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:46:52,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:46:52,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:46:52,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:46:52,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:46:52,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:46:52,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:46:52,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:46:52,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:46:52,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:46:52,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:46:52,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:46:52,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:46:52,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:46:52,702 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:46:52,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:46:52,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:46:52,703 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:46:52,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:46:52,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:46:52,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:46:52,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:46:52,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:46:52,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:46:52,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:46:52,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:46:52,705 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:46:52,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:46:52,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:46:52,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:46:52,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:46:52,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:46:52,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:46:52,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:46:52,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:46:52,707 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:46:52,707 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:46:52,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:46:53,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:46:53,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:46:53,019 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:46:53,020 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:46:53,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2021-05-02 19:46:53,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d9ba37dd/9f662e44a9c84a929269b083daef637c/FLAG6755b334a [2021-05-02 19:46:53,349 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:46:53,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2021-05-02 19:46:53,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d9ba37dd/9f662e44a9c84a929269b083daef637c/FLAG6755b334a [2021-05-02 19:46:53,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d9ba37dd/9f662e44a9c84a929269b083daef637c [2021-05-02 19:46:53,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:46:53,789 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:46:53,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:46:53,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:46:53,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:46:53,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:46:53" (1/1) ... [2021-05-02 19:46:53,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33880e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:53, skipping insertion in model container [2021-05-02 19:46:53,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:46:53" (1/1) ... [2021-05-02 19:46:53,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:46:53,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:46:53,885 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c[576,589] [2021-05-02 19:46:53,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:46:53,901 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:46:53,908 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c[576,589] [2021-05-02 19:46:53,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:46:53,929 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:46:53,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:53 WrapperNode [2021-05-02 19:46:53,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:46:53,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:46:53,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:46:53,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:46:53,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:53" (1/1) ... [2021-05-02 19:46:53,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:53" (1/1) ... [2021-05-02 19:46:53,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:53" (1/1) ... [2021-05-02 19:46:53,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:53" (1/1) ... [2021-05-02 19:46:53,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:53" (1/1) ... [2021-05-02 19:46:53,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:53" (1/1) ... [2021-05-02 19:46:53,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:53" (1/1) ... [2021-05-02 19:46:53,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:46:53,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:46:53,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:46:53,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:46:53,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:46:54,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:46:54,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:46:54,011 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:46:54,011 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:46:54,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:46:54,011 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:46:54,011 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:46:54,011 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:46:54,011 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:46:54,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:46:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:46:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:46:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:46:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:46:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:46:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:46:54,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:46:54,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:46:54,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:46:54,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:46:54,200 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:46:54,201 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 19:46:54,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:46:54 BoogieIcfgContainer [2021-05-02 19:46:54,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:46:54,202 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:46:54,202 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:46:54,203 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:46:54,204 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:46:54" (1/1) ... [2021-05-02 19:46:54,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:46:54 BasicIcfg [2021-05-02 19:46:54,228 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:46:54,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:46:54,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:46:54,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:46:54,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:46:53" (1/4) ... [2021-05-02 19:46:54,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3511e7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:46:54, skipping insertion in model container [2021-05-02 19:46:54,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:53" (2/4) ... [2021-05-02 19:46:54,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3511e7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:46:54, skipping insertion in model container [2021-05-02 19:46:54,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:46:54" (3/4) ... [2021-05-02 19:46:54,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3511e7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:46:54, skipping insertion in model container [2021-05-02 19:46:54,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:46:54" (4/4) ... [2021-05-02 19:46:54,238 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound5.cJordan [2021-05-02 19:46:54,241 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:46:54,243 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:46:54,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:46:54,265 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:46:54,265 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:46:54,265 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:46:54,265 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:46:54,265 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:46:54,265 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:46:54,266 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:46:54,266 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:46:54,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:46:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 19:46:54,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:54,278 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:54,279 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:54,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash 795680375, now seen corresponding path program 1 times [2021-05-02 19:46:54,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:54,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102067473] [2021-05-02 19:46:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:54,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:46:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:54,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:46:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:54,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 19:46:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:54,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 19:46:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 19:46:54,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:54,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102067473] [2021-05-02 19:46:54,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102067473] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:46:54,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:46:54,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:46:54,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849041978] [2021-05-02 19:46:54,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:46:54,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:54,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:46:54,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:46:54,438 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 19:46:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:54,531 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-02 19:46:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:46:54,533 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-02 19:46:54,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:54,538 INFO L225 Difference]: With dead ends: 39 [2021-05-02 19:46:54,538 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 19:46:54,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:46:54,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 19:46:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 19:46:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:46:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-02 19:46:54,572 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2021-05-02 19:46:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:54,573 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-02 19:46:54,573 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 19:46:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-02 19:46:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 19:46:54,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:54,575 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:54,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:46:54,576 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:54,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:54,579 INFO L82 PathProgramCache]: Analyzing trace with hash 797557208, now seen corresponding path program 1 times [2021-05-02 19:46:54,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:54,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413317303] [2021-05-02 19:46:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:54,593 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:54,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446409148] [2021-05-02 19:46:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:54,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:46:54,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:54,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 19:46:54,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:54,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413317303] [2021-05-02 19:46:54,862 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:54,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446409148] [2021-05-02 19:46:54,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446409148] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:46:54,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:46:54,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 19:46:54,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265651912] [2021-05-02 19:46:54,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:46:54,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:54,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:46:54,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:46:54,864 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:46:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:54,953 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-02 19:46:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:46:54,953 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 19:46:54,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:54,954 INFO L225 Difference]: With dead ends: 43 [2021-05-02 19:46:54,954 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 19:46:54,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:46:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 19:46:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 19:46:54,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:46:54,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 19:46:54,960 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2021-05-02 19:46:54,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:54,960 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 19:46:54,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:46:54,960 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 19:46:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 19:46:54,961 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:54,961 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:55,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:46:55,176 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:55,177 INFO L82 PathProgramCache]: Analyzing trace with hash 648866686, now seen corresponding path program 1 times [2021-05-02 19:46:55,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:55,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831106802] [2021-05-02 19:46:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:55,197 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:55,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141346006] [2021-05-02 19:46:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:55,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:46:55,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:55,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 19:46:55,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:55,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831106802] [2021-05-02 19:46:55,389 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:55,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141346006] [2021-05-02 19:46:55,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141346006] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:46:55,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:46:55,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 19:46:55,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411464775] [2021-05-02 19:46:55,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:46:55,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:55,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:46:55,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:46:55,390 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:46:55,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:55,514 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-05-02 19:46:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:46:55,515 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2021-05-02 19:46:55,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:55,517 INFO L225 Difference]: With dead ends: 55 [2021-05-02 19:46:55,518 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 19:46:55,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:46:55,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 19:46:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 19:46:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 19:46:55,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-05-02 19:46:55,536 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2021-05-02 19:46:55,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:55,537 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-05-02 19:46:55,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:46:55,537 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-05-02 19:46:55,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 19:46:55,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:55,538 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-02 19:46:55,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:55,741 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:55,741 INFO L82 PathProgramCache]: Analyzing trace with hash 619469170, now seen corresponding path program 1 times [2021-05-02 19:46:55,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:55,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955308325] [2021-05-02 19:46:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:55,753 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:55,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086137360] [2021-05-02 19:46:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:55,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:46:55,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:55,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 19:46:55,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:55,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955308325] [2021-05-02 19:46:55,904 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:55,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086137360] [2021-05-02 19:46:55,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086137360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:55,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:55,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:46:55,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981577146] [2021-05-02 19:46:55,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:46:55,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:55,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:46:55,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:46:55,906 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 19:46:55,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:55,995 INFO L93 Difference]: Finished difference Result 77 states and 103 transitions. [2021-05-02 19:46:55,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:46:55,995 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2021-05-02 19:46:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:55,998 INFO L225 Difference]: With dead ends: 77 [2021-05-02 19:46:55,998 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 19:46:56,000 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:46:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 19:46:56,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-05-02 19:46:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 19:46:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2021-05-02 19:46:56,012 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2021-05-02 19:46:56,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:56,013 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2021-05-02 19:46:56,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 19:46:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2021-05-02 19:46:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 19:46:56,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:56,017 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 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, 1, 1, 1, 1] [2021-05-02 19:46:56,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:56,223 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:56,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:56,223 INFO L82 PathProgramCache]: Analyzing trace with hash -810208713, now seen corresponding path program 1 times [2021-05-02 19:46:56,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:56,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951553078] [2021-05-02 19:46:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:56,232 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:56,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166582601] [2021-05-02 19:46:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:56,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:46:56,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:56,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 19:46:56,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:56,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951553078] [2021-05-02 19:46:56,482 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:56,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166582601] [2021-05-02 19:46:56,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166582601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:56,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:56,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:46:56,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420709674] [2021-05-02 19:46:56,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:46:56,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:56,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:46:56,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:46:56,483 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 19:46:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:56,610 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2021-05-02 19:46:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:46:56,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-05-02 19:46:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:56,613 INFO L225 Difference]: With dead ends: 74 [2021-05-02 19:46:56,613 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 19:46:56,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:46:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 19:46:56,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-02 19:46:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 19:46:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-05-02 19:46:56,618 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 56 [2021-05-02 19:46:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:56,618 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-05-02 19:46:56,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 19:46:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-05-02 19:46:56,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 19:46:56,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:56,619 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:56,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:56,825 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:56,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1603019557, now seen corresponding path program 1 times [2021-05-02 19:46:56,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:56,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504777832] [2021-05-02 19:46:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:56,836 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:56,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691553545] [2021-05-02 19:46:56,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:56,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:46:56,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:56,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:56,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 19:46:57,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:57,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504777832] [2021-05-02 19:46:57,108 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:57,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691553545] [2021-05-02 19:46:57,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691553545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:57,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:57,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:46:57,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74766705] [2021-05-02 19:46:57,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:46:57,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:57,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:46:57,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:46:57,109 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:46:57,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:57,254 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2021-05-02 19:46:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:46:57,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2021-05-02 19:46:57,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:57,257 INFO L225 Difference]: With dead ends: 95 [2021-05-02 19:46:57,257 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 19:46:57,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:46:57,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 19:46:57,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-05-02 19:46:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 19:46:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2021-05-02 19:46:57,273 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 63 [2021-05-02 19:46:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:57,273 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2021-05-02 19:46:57,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:46:57,274 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2021-05-02 19:46:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 19:46:57,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:57,275 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:57,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:46:57,476 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1439194403, now seen corresponding path program 1 times [2021-05-02 19:46:57,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:57,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766240755] [2021-05-02 19:46:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:57,487 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:57,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716676796] [2021-05-02 19:46:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:57,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 19:46:57,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:57,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 46 proven. 15 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 19:46:57,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:57,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766240755] [2021-05-02 19:46:57,926 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:57,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716676796] [2021-05-02 19:46:57,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716676796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:57,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:57,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:46:57,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451000004] [2021-05-02 19:46:57,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:46:57,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:57,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:46:57,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:46:57,928 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 19:46:58,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:58,228 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2021-05-02 19:46:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:46:58,228 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) Word has length 86 [2021-05-02 19:46:58,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:58,233 INFO L225 Difference]: With dead ends: 120 [2021-05-02 19:46:58,233 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 19:46:58,233 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:46:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 19:46:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2021-05-02 19:46:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 64 states have (on average 1.125) internal successors, (72), 66 states have internal predecessors, (72), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-02 19:46:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 146 transitions. [2021-05-02 19:46:58,248 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 146 transitions. Word has length 86 [2021-05-02 19:46:58,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:58,248 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 146 transitions. [2021-05-02 19:46:58,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 19:46:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 146 transitions. [2021-05-02 19:46:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 19:46:58,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:58,254 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:58,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:58,454 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:58,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:58,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2120729957, now seen corresponding path program 2 times [2021-05-02 19:46:58,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:58,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937557567] [2021-05-02 19:46:58,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:58,463 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:58,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100345772] [2021-05-02 19:46:58,463 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:58,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:46:58,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:58,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 19:46:58,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:58,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:58,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:59,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:59,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:59,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 69 proven. 24 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-05-02 19:46:59,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:59,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937557567] [2021-05-02 19:46:59,103 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:59,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100345772] [2021-05-02 19:46:59,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100345772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:59,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:59,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 19:46:59,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105813209] [2021-05-02 19:46:59,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 19:46:59,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:59,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 19:46:59,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:46:59,104 INFO L87 Difference]: Start difference. First operand 114 states and 146 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-02 19:46:59,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:59,574 INFO L93 Difference]: Finished difference Result 139 states and 182 transitions. [2021-05-02 19:46:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 19:46:59,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) Word has length 109 [2021-05-02 19:46:59,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:59,576 INFO L225 Difference]: With dead ends: 139 [2021-05-02 19:46:59,576 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 19:46:59,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:46:59,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 19:46:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2021-05-02 19:46:59,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 64 states have (on average 1.109375) internal successors, (71), 66 states have internal predecessors, (71), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-02 19:46:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2021-05-02 19:46:59,581 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 109 [2021-05-02 19:46:59,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:59,581 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2021-05-02 19:46:59,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-02 19:46:59,582 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2021-05-02 19:46:59,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 19:46:59,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:59,582 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:59,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:59,797 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:59,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:59,797 INFO L82 PathProgramCache]: Analyzing trace with hash 435194, now seen corresponding path program 3 times [2021-05-02 19:46:59,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:59,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096949330] [2021-05-02 19:46:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:59,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:59,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653173158] [2021-05-02 19:46:59,805 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:59,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 19:46:59,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:59,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:46:59,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:59,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:59,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:00,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:00,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:00,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:00,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:00,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:00,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 123 proven. 35 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-05-02 19:47:00,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:47:00,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096949330] [2021-05-02 19:47:00,051 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:47:00,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653173158] [2021-05-02 19:47:00,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653173158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:47:00,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:47:00,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:47:00,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986749862] [2021-05-02 19:47:00,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:47:00,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:47:00,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:47:00,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:47:00,052 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 19:47:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:47:08,271 INFO L93 Difference]: Finished difference Result 130 states and 157 transitions. [2021-05-02 19:47:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:47:08,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 116 [2021-05-02 19:47:08,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:47:08,273 INFO L225 Difference]: With dead ends: 130 [2021-05-02 19:47:08,273 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 19:47:08,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:47:08,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 19:47:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-02 19:47:08,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 77 states have internal predecessors, (82), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-02 19:47:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2021-05-02 19:47:08,277 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 116 [2021-05-02 19:47:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:47:08,277 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2021-05-02 19:47:08,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 19:47:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2021-05-02 19:47:08,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-02 19:47:08,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:47:08,279 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:47:08,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 19:47:08,479 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:47:08,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:47:08,480 INFO L82 PathProgramCache]: Analyzing trace with hash -759294954, now seen corresponding path program 4 times [2021-05-02 19:47:08,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:47:08,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983112527] [2021-05-02 19:47:08,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:47:08,486 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:47:08,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116027246] [2021-05-02 19:47:08,486 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:47:08,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:47:08,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:47:08,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:47:08,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:47:08,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 180 proven. 20 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2021-05-02 19:47:08,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:47:08,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983112527] [2021-05-02 19:47:08,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:47:08,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116027246] [2021-05-02 19:47:08,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116027246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:47:08,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:47:08,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:47:08,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928506792] [2021-05-02 19:47:08,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:47:08,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:47:08,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:47:08,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:47:08,960 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-02 19:47:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:47:09,186 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2021-05-02 19:47:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:47:09,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 133 [2021-05-02 19:47:09,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:47:09,189 INFO L225 Difference]: With dead ends: 174 [2021-05-02 19:47:09,189 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 19:47:09,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:47:09,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 19:47:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2021-05-02 19:47:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 88 states have internal predecessors, (93), 50 states have call successors, (50), 16 states have call predecessors, (50), 15 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 19:47:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 191 transitions. [2021-05-02 19:47:09,198 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 191 transitions. Word has length 133 [2021-05-02 19:47:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:47:09,199 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 191 transitions. [2021-05-02 19:47:09,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-02 19:47:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 191 transitions. [2021-05-02 19:47:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 19:47:09,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:47:09,202 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:47:09,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:47:09,405 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:47:09,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:47:09,405 INFO L82 PathProgramCache]: Analyzing trace with hash 960282776, now seen corresponding path program 5 times [2021-05-02 19:47:09,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:47:09,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652091625] [2021-05-02 19:47:09,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:47:09,412 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:47:09,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876126412] [2021-05-02 19:47:09,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:47:09,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-02 19:47:09,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:47:09,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 19:47:09,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:47:09,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2021-05-02 19:47:09,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:47:09,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652091625] [2021-05-02 19:47:09,653 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:47:09,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876126412] [2021-05-02 19:47:09,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876126412] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:47:09,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:47:09,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 19:47:09,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353381488] [2021-05-02 19:47:09,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:47:09,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:47:09,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:47:09,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:47:09,654 INFO L87 Difference]: Start difference. First operand 152 states and 191 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-05-02 19:47:09,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:47:09,683 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2021-05-02 19:47:09,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:47:09,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 156 [2021-05-02 19:47:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:47:09,686 INFO L225 Difference]: With dead ends: 154 [2021-05-02 19:47:09,686 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 19:47:09,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:47:09,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 19:47:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 19:47:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 82 states have internal predecessors, (86), 49 states have call successors, (49), 15 states have call predecessors, (49), 14 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 19:47:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 182 transitions. [2021-05-02 19:47:09,694 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 182 transitions. Word has length 156 [2021-05-02 19:47:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:47:09,695 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 182 transitions. [2021-05-02 19:47:09,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-05-02 19:47:09,695 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 182 transitions. [2021-05-02 19:47:09,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-05-02 19:47:09,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:47:09,697 INFO L523 BasicCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:47:09,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:47:09,921 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:47:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:47:09,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2033431792, now seen corresponding path program 6 times [2021-05-02 19:47:09,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:47:09,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719131184] [2021-05-02 19:47:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:47:09,928 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:47:09,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926795959] [2021-05-02 19:47:09,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:47:09,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 19:47:09,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:47:09,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 19:47:09,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:47:09,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:09,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:47:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 310 proven. 3 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2021-05-02 19:47:10,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:47:10,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719131184] [2021-05-02 19:47:10,336 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:47:10,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926795959] [2021-05-02 19:47:10,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926795959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:47:10,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:47:10,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:47:10,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773401240] [2021-05-02 19:47:10,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:47:10,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:47:10,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:47:10,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:47:10,338 INFO L87 Difference]: Start difference. First operand 145 states and 182 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-05-02 19:47:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:47:10,453 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2021-05-02 19:47:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:47:10,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 179 [2021-05-02 19:47:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:47:10,455 INFO L225 Difference]: With dead ends: 116 [2021-05-02 19:47:10,455 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:47:10,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:47:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:47:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:47:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:47:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:47:10,456 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 179 [2021-05-02 19:47:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:47:10,456 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:47:10,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-05-02 19:47:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:47:10,456 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:47:10,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 19:47:10,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:47:10 BasicIcfg [2021-05-02 19:47:10,672 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:47:10,672 INFO L168 Benchmark]: Toolchain (without parser) took 16883.66 ms. Allocated memory was 209.7 MB in the beginning and 314.6 MB in the end (delta: 104.9 MB). Free memory was 175.2 MB in the beginning and 143.6 MB in the end (delta: 31.6 MB). Peak memory consumption was 137.3 MB. Max. memory is 8.0 GB. [2021-05-02 19:47:10,672 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 209.7 MB. Free memory is still 191.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:47:10,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 138.42 ms. Allocated memory is still 209.7 MB. Free memory was 175.0 MB in the beginning and 193.7 MB in the end (delta: -18.6 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:47:10,672 INFO L168 Benchmark]: Boogie Preprocessor took 29.24 ms. Allocated memory is still 209.7 MB. Free memory was 193.7 MB in the beginning and 191.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:47:10,673 INFO L168 Benchmark]: RCFGBuilder took 241.59 ms. Allocated memory is still 209.7 MB. Free memory was 191.9 MB in the beginning and 175.7 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:47:10,673 INFO L168 Benchmark]: IcfgTransformer took 26.30 ms. Allocated memory is still 209.7 MB. Free memory was 175.7 MB in the beginning and 174.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:47:10,673 INFO L168 Benchmark]: TraceAbstraction took 16442.77 ms. Allocated memory was 209.7 MB in the beginning and 314.6 MB in the end (delta: 104.9 MB). Free memory was 174.1 MB in the beginning and 143.6 MB in the end (delta: 30.5 MB). Peak memory consumption was 135.9 MB. Max. memory is 8.0 GB. [2021-05-02 19:47:10,673 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 209.7 MB. Free memory is still 191.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 138.42 ms. Allocated memory is still 209.7 MB. Free memory was 175.0 MB in the beginning and 193.7 MB in the end (delta: -18.6 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.24 ms. Allocated memory is still 209.7 MB. Free memory was 193.7 MB in the beginning and 191.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 241.59 ms. Allocated memory is still 209.7 MB. Free memory was 191.9 MB in the beginning and 175.7 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 26.30 ms. Allocated memory is still 209.7 MB. Free memory was 175.7 MB in the beginning and 174.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16442.77 ms. Allocated memory was 209.7 MB in the beginning and 314.6 MB in the end (delta: 104.9 MB). Free memory was 174.1 MB in the beginning and 143.6 MB in the end (delta: 30.5 MB). Peak memory consumption was 135.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16405.2ms, OverallIterations: 12, TraceHistogramMax: 27, EmptinessCheckTime: 25.1ms, AutomataDifference: 10082.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 497 SDtfs, 363 SDslu, 2000 SDs, 0 SdLazy, 2119 SolverSat, 362 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 9173.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1036 GetRequests, 905 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1110.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=10, InterpolantAutomatonStates: 123, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 119.2ms AutomataMinimizationTime, 12 MinimizatonAttempts, 48 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 99.5ms SsaConstructionTime, 318.3ms SatisfiabilityAnalysisTime, 3023.0ms InterpolantComputationTime, 1027 NumberOfCodeBlocks, 868 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 1015 ConstructedInterpolants, 0 QuantifiedInterpolants, 3700 SizeOfPredicates, 55 NumberOfNonLiveVariables, 2278 ConjunctsInSsa, 256 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 4414/4533 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...