/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/geo3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:51:30,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:51:30,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:51:30,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:51:30,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:51:30,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:51:30,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:51:30,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:51:30,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:51:30,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:51:30,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:51:30,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:51:30,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:51:30,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:51:30,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:51:30,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:51:30,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:51:30,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:51:30,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:51:30,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:51:30,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:51:30,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:51:30,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:51:30,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:51:30,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:51:30,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:51:30,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:51:30,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:51:30,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:51:30,909 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:51:30,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:51:30,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:51:30,912 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:51:30,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:51:30,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:51:30,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:51:30,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:51:30,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:51:30,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:51:30,913 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:51:30,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:51:30,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:51:30,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:51:30,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:51:30,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:51:30,914 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:51:30,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:51:30,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:51:30,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:51:30,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:51:30,915 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:51:30,915 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:51:31,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:51:31,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:51:31,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:51:31,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:51:31,166 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:51:31,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound10.c [2021-05-02 20:51:31,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/114654dbb/a7c32cd47b75453a853d389d07b6f1aa/FLAG1391143e9 [2021-05-02 20:51:31,495 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:51:31,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound10.c [2021-05-02 20:51:31,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/114654dbb/a7c32cd47b75453a853d389d07b6f1aa/FLAG1391143e9 [2021-05-02 20:51:31,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/114654dbb/a7c32cd47b75453a853d389d07b6f1aa [2021-05-02 20:51:31,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:51:31,939 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:51:31,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:51:31,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:51:31,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:51:31,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:51:31" (1/1) ... [2021-05-02 20:51:31,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@519825b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:31, skipping insertion in model container [2021-05-02 20:51:31,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:51:31" (1/1) ... [2021-05-02 20:51:31,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:51:31,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:51:32,046 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/geo3-ll_unwindbound10.c[525,538] [2021-05-02 20:51:32,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:51:32,058 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:51:32,090 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/geo3-ll_unwindbound10.c[525,538] [2021-05-02 20:51:32,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:51:32,112 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:51:32,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:32 WrapperNode [2021-05-02 20:51:32,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:51:32,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:51:32,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:51:32,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:51:32,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:32" (1/1) ... [2021-05-02 20:51:32,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:32" (1/1) ... [2021-05-02 20:51:32,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:32" (1/1) ... [2021-05-02 20:51:32,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:32" (1/1) ... [2021-05-02 20:51:32,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:32" (1/1) ... [2021-05-02 20:51:32,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:32" (1/1) ... [2021-05-02 20:51:32,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:32" (1/1) ... [2021-05-02 20:51:32,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:51:32,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:51:32,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:51:32,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:51:32,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:51:32,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:51:32,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:51:32,210 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:51:32,210 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:51:32,210 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:51:32,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:51:32,210 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:51:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:51:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:51:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:51:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:51:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:51:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:51:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:51:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:51:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:51:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:51:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:51:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:51:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:51:32,453 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:51:32,453 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:51:32,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:32 BoogieIcfgContainer [2021-05-02 20:51:32,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:51:32,454 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:51:32,454 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:51:32,455 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:51:32,457 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:32" (1/1) ... [2021-05-02 20:51:32,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:51:32 BasicIcfg [2021-05-02 20:51:32,470 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:51:32,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:51:32,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:51:32,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:51:32,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:51:31" (1/4) ... [2021-05-02 20:51:32,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a07c4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:51:32, skipping insertion in model container [2021-05-02 20:51:32,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:32" (2/4) ... [2021-05-02 20:51:32,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a07c4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:51:32, skipping insertion in model container [2021-05-02 20:51:32,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:32" (3/4) ... [2021-05-02 20:51:32,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a07c4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:51:32, skipping insertion in model container [2021-05-02 20:51:32,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:51:32" (4/4) ... [2021-05-02 20:51:32,475 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound10.cJordan [2021-05-02 20:51:32,478 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:51:32,481 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:51:32,493 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:51:32,514 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:51:32,514 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:51:32,514 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:51:32,515 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:51:32,515 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:51:32,515 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:51:32,515 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:51:32,515 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:51:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:51:32,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 20:51:32,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:32,533 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:32,533 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:32,537 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-02 20:51:32,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:32,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185432030] [2021-05-02 20:51:32,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:32,624 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:32,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348626997] [2021-05-02 20:51:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:32,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:51:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:32,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:32,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185432030] [2021-05-02 20:51:32,772 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:32,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348626997] [2021-05-02 20:51:32,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348626997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:51:32,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:51:32,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:51:32,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41733317] [2021-05-02 20:51:32,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:51:32,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:32,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:51:32,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:51:32,794 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:32,803 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-02 20:51:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:51:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 20:51:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:32,815 INFO L225 Difference]: With dead ends: 22 [2021-05-02 20:51:32,815 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 20:51:32,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:51:32,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 20:51:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 20:51:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:32,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 20:51:32,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 20:51:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:32,837 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 20:51:32,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 20:51:32,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 20:51:32,838 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:32,839 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:33,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:51:33,054 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:33,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-02 20:51:33,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:33,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646060356] [2021-05-02 20:51:33,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:33,067 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:33,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98758236] [2021-05-02 20:51:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:33,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:51:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:33,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:33,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:33,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:33,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:33,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:33,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:33,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646060356] [2021-05-02 20:51:33,207 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:33,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98758236] [2021-05-02 20:51:33,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98758236] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:51:33,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:51:33,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:51:33,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875308305] [2021-05-02 20:51:33,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:51:33,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:33,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:51:33,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:51:33,209 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:33,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:33,224 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-02 20:51:33,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:51:33,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 20:51:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:33,225 INFO L225 Difference]: With dead ends: 19 [2021-05-02 20:51:33,225 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 20:51:33,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:51:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 20:51:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 20:51:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 20:51:33,239 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 20:51:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:33,246 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 20:51:33,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 20:51:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 20:51:33,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:33,253 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:33,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:33,465 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:33,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:33,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-02 20:51:33,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:33,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288494517] [2021-05-02 20:51:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:33,475 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:33,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745313081] [2021-05-02 20:51:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:33,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 20:51:33,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:33,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:33,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:33,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:33,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288494517] [2021-05-02 20:51:33,617 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:33,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745313081] [2021-05-02 20:51:33,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745313081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:51:33,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:51:33,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:51:33,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010671463] [2021-05-02 20:51:33,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:51:33,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:33,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:51:33,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:51:33,619 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:33,649 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 20:51:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:51:33,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 20:51:33,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:33,650 INFO L225 Difference]: With dead ends: 26 [2021-05-02 20:51:33,650 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:51:33,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:51:33,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:51:33,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:51:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:33,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 20:51:33,653 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 20:51:33,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:33,654 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 20:51:33,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:51:33,654 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 20:51:33,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:51:33,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:33,654 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:33,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:33,861 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:33,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:33,861 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-02 20:51:33,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:33,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021268611] [2021-05-02 20:51:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:33,872 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:33,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434606846] [2021-05-02 20:51:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:33,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:51:33,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:33,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:33,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:33,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:33,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:33,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:33,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:34,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:34,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:34,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:34,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021268611] [2021-05-02 20:51:34,030 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:34,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434606846] [2021-05-02 20:51:34,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434606846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:34,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:34,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:51:34,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391023520] [2021-05-02 20:51:34,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:51:34,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:34,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:51:34,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:51:34,032 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:34,060 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-02 20:51:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:51:34,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:51:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:34,061 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:51:34,061 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:51:34,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:51:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:51:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:51:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 20:51:34,065 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 20:51:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:34,066 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 20:51:34,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 20:51:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:51:34,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:34,066 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:34,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:34,271 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:34,271 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-02 20:51:34,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:34,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352124105] [2021-05-02 20:51:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:34,279 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:34,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215902831] [2021-05-02 20:51:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:34,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:51:34,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:34,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:34,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:34,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:34,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352124105] [2021-05-02 20:51:34,410 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:34,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215902831] [2021-05-02 20:51:34,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215902831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:34,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:34,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:51:34,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032421681] [2021-05-02 20:51:34,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:51:34,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:34,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:51:34,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:51:34,411 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:39,316 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 20:51:39,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:51:39,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:51:39,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:39,317 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:51:39,317 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:51:39,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:51:39,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:51:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 20:51:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:51:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-02 20:51:39,326 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2021-05-02 20:51:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:39,326 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-02 20:51:39,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:51:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-02 20:51:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 20:51:39,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:39,327 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:39,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:39,528 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:39,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:39,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1181683872, now seen corresponding path program 1 times [2021-05-02 20:51:39,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:39,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583206303] [2021-05-02 20:51:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:39,536 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:39,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222225862] [2021-05-02 20:51:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:39,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:51:39,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:39,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:51:39,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:39,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583206303] [2021-05-02 20:51:39,670 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:39,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222225862] [2021-05-02 20:51:39,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222225862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:39,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:39,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:51:39,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344259818] [2021-05-02 20:51:39,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:51:39,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:39,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:51:39,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:51:39,671 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:51:41,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:41,744 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-05-02 20:51:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:51:41,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-05-02 20:51:41,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:41,746 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:51:41,746 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:51:41,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:51:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:51:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:51:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:51:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-05-02 20:51:41,749 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2021-05-02 20:51:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:41,749 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-05-02 20:51:41,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:51:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-05-02 20:51:41,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:51:41,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:41,750 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:41,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:41,965 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:41,965 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-02 20:51:41,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:41,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43942280] [2021-05-02 20:51:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:41,971 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:41,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309523330] [2021-05-02 20:51:41,971 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 20:51:42,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:51:42,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:51:42,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:51:42,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:42,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:42,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:42,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:42,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:42,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:42,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:42,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:42,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:42,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:42,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:42,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:51:42,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:42,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43942280] [2021-05-02 20:51:42,106 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:42,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309523330] [2021-05-02 20:51:42,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309523330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:42,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:42,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:51:42,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025634036] [2021-05-02 20:51:42,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:51:42,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:42,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:51:42,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:51:42,107 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:42,147 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-05-02 20:51:42,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:51:42,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 20:51:42,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:42,149 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:51:42,149 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:51:42,149 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:51:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:51:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:51:42,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:51:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-02 20:51:42,153 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 28 [2021-05-02 20:51:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:42,154 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-02 20:51:42,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-02 20:51:42,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:51:42,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:42,154 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:42,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:42,355 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:42,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:42,355 INFO L82 PathProgramCache]: Analyzing trace with hash -869871361, now seen corresponding path program 2 times [2021-05-02 20:51:42,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:42,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169892132] [2021-05-02 20:51:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:42,361 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:42,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81923376] [2021-05-02 20:51:42,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:42,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:51:42,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:51:42,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 20:51:42,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:46,818 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 16 [2021-05-02 20:51:48,973 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 15 [2021-05-02 20:51:48,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:49,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:51:49,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:49,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169892132] [2021-05-02 20:51:49,039 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:49,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81923376] [2021-05-02 20:51:49,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81923376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:49,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:49,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:51:49,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877564251] [2021-05-02 20:51:49,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:51:49,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:49,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:51:49,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2021-05-02 20:51:49,042 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:52:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:05,281 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-05-02 20:52:05,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:52:05,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 20:52:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:05,283 INFO L225 Difference]: With dead ends: 41 [2021-05-02 20:52:05,283 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 20:52:05,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6360.3ms TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2021-05-02 20:52:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 20:52:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-05-02 20:52:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:52:05,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-02 20:52:05,285 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 28 [2021-05-02 20:52:05,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:05,286 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-02 20:52:05,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:52:05,286 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-02 20:52:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:52:05,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:05,286 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:05,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:52:05,489 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:05,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-02 20:52:05,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:05,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111772247] [2021-05-02 20:52:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:05,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:05,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281359390] [2021-05-02 20:52:05,504 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:05,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:52:05,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:05,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:52:05,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:08,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:08,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:08,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:08,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:08,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:08,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:08,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:08,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:08,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:08,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:08,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:08,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:08,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:10,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:12,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:30,958 WARN L205 SmtUtils]: Spent 12.41 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:52:30,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:30,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:33,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:33,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:33,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:33,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:33,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,466 WARN L205 SmtUtils]: Spent 10.12 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:52:52,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:54,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:54,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:54,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:54,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:54,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,631 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from false [2021-05-02 20:53:00,639 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from true [2021-05-02 20:53:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 1 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:53:00,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:00,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111772247] [2021-05-02 20:53:00,639 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:00,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281359390] [2021-05-02 20:53:00,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281359390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:00,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:00,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:53:00,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494935850] [2021-05-02 20:53:00,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:53:00,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:00,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:53:00,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=48, Unknown=9, NotChecked=14, Total=90 [2021-05-02 20:53:00,641 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:53:04,919 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 37 DAG size of output: 3 [2021-05-02 20:53:13,175 WARN L205 SmtUtils]: Spent 8.25 s on a formula simplification. DAG size of input: 43 DAG size of output: 6 [2021-05-02 20:53:48,667 WARN L205 SmtUtils]: Spent 21.81 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-02 20:55:13,190 WARN L205 SmtUtils]: Spent 1.16 m on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 20:55:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:55:15,201 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-02 20:55:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:55:15,329 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 20:55:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:55:15,330 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:55:15,330 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 20:55:15,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 157999.3ms TimeCoverageRelationStatistics Valid=46, Invalid=125, Unknown=15, NotChecked=24, Total=210 [2021-05-02 20:55:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 20:55:15,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 20:55:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:55:15,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 20:55:15,332 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 20:55:15,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:55:15,332 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 20:55:15,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:55:15,333 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 20:55:15,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:55:15,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:55:15,333 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:55:15,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:55:15,536 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:55:15,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:55:15,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2081254464, now seen corresponding path program 3 times [2021-05-02 20:55:15,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:55:15,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351298880] [2021-05-02 20:55:15,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:55:15,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:55:15,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567251798] [2021-05-02 20:55:15,543 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:55:15,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:55:15,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:55:15,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:55:15,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:55:19,739 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 20:55:19,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:19,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:26,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:28,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:28,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:28,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:28,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:28,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:28,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:28,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:30,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:32,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:34,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:47,535 WARN L205 SmtUtils]: Spent 10.41 s on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 20:55:47,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:47,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:49,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:49,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:49,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:49,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:49,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:49,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:49,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:51,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:51,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:51,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:51,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:51,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:51,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:51,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:51,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:10,212 WARN L205 SmtUtils]: Spent 12.40 s on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 20:56:10,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:10,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:12,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:12,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:12,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:12,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:12,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:12,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:12,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:14,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:14,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:14,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:14,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:14,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:14,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:14,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:14,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:16,354 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from false [2021-05-02 20:56:18,470 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from true [2021-05-02 20:56:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 1 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:56:18,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:18,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351298880] [2021-05-02 20:56:18,471 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:18,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567251798] [2021-05-02 20:56:18,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567251798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:18,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:18,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:56:18,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736119765] [2021-05-02 20:56:18,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:56:18,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:18,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:56:18,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=51, Unknown=6, NotChecked=14, Total=90 [2021-05-02 20:56:18,472 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:56:24,645 WARN L205 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 45 DAG size of output: 6 [2021-05-02 20:57:10,991 WARN L205 SmtUtils]: Spent 25.34 s on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-05-02 20:57:39,529 WARN L205 SmtUtils]: Spent 24.48 s on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 20:57:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:41,550 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 20:57:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:57:41,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 20:57:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:41,561 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:57:41,561 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:57:41,561 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 105580.5ms TimeCoverageRelationStatistics Valid=41, Invalid=107, Unknown=12, NotChecked=22, Total=182 [2021-05-02 20:57:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:57:41,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:57:41,562 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 20:57:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:57:41,562 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-02 20:57:41,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:41,562 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:57:41,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:57:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:57:41,562 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:57:41,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:57:41,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:57:41 BasicIcfg [2021-05-02 20:57:41,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:57:41,768 INFO L168 Benchmark]: Toolchain (without parser) took 369829.42 ms. Allocated memory was 194.0 MB in the beginning and 232.8 MB in the end (delta: 38.8 MB). Free memory was 159.6 MB in the beginning and 117.4 MB in the end (delta: 42.3 MB). Peak memory consumption was 82.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:41,768 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 194.0 MB. Free memory is still 175.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:57:41,768 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.38 ms. Allocated memory is still 194.0 MB. Free memory was 159.4 MB in the beginning and 177.1 MB in the end (delta: -17.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:41,769 INFO L168 Benchmark]: Boogie Preprocessor took 34.77 ms. Allocated memory is still 194.0 MB. Free memory was 177.1 MB in the beginning and 176.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:41,769 INFO L168 Benchmark]: RCFGBuilder took 305.69 ms. Allocated memory is still 194.0 MB. Free memory was 176.1 MB in the beginning and 160.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:41,769 INFO L168 Benchmark]: IcfgTransformer took 15.59 ms. Allocated memory is still 194.0 MB. Free memory was 160.9 MB in the beginning and 159.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:41,769 INFO L168 Benchmark]: TraceAbstraction took 369297.05 ms. Allocated memory was 194.0 MB in the beginning and 232.8 MB in the end (delta: 38.8 MB). Free memory was 159.3 MB in the beginning and 117.4 MB in the end (delta: 41.9 MB). Peak memory consumption was 82.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:41,769 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 194.0 MB. Free memory is still 175.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 170.38 ms. Allocated memory is still 194.0 MB. Free memory was 159.4 MB in the beginning and 177.1 MB in the end (delta: -17.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.77 ms. Allocated memory is still 194.0 MB. Free memory was 177.1 MB in the beginning and 176.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 305.69 ms. Allocated memory is still 194.0 MB. Free memory was 176.1 MB in the beginning and 160.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 15.59 ms. Allocated memory is still 194.0 MB. Free memory was 160.9 MB in the beginning and 159.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 369297.05 ms. Allocated memory was 194.0 MB in the beginning and 232.8 MB in the end (delta: 38.8 MB). Free memory was 159.3 MB in the beginning and 117.4 MB in the end (delta: 41.9 MB). Peak memory consumption was 82.0 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 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 369252.4ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 14.3ms, AutomataDifference: 241163.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 172 SDtfs, 83 SDslu, 512 SDs, 0 SdLazy, 266 SolverSat, 26 SolverUnsat, 28 SolverUnknown, 0 SolverNotchecked, 58697.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 270104.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=8, InterpolantAutomatonStates: 72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.7ms AutomataMinimizationTime, 10 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 75.4ms SsaConstructionTime, 445.4ms SatisfiabilityAnalysisTime, 124903.6ms InterpolantComputationTime, 229 NumberOfCodeBlocks, 197 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 219 ConstructedInterpolants, 6 QuantifiedInterpolants, 1766 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1345 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 97/130 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...