/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/hard-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:56:38,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:56:38,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:56:39,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:56:39,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:56:39,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:56:39,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:56:39,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:56:39,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:56:39,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:56:39,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:56:39,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:56:39,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:56:39,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:56:39,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:56:39,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:56:39,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:56:39,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:56:39,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:56:39,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:56:39,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:56:39,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:56:39,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:56:39,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:56:39,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:56:39,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:56:39,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:56:39,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:56:39,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:56:39,107 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:56:39,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:56:39,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:56:39,110 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:56:39,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:56:39,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:56:39,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:56:39,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:56:39,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:56:39,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:56:39,111 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:56:39,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:56:39,112 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:56:39,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:56:39,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:56:39,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:56:39,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:56:39,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:56:39,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:56:39,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:56:39,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:56:39,114 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:56:39,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:56:39,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:56:39,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:56:39,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:56:39,405 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:56:39,406 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:56:39,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c [2021-05-02 20:56:39,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ae942644/78f9e208cd65495787a30f982c7bf6ef/FLAG0aced7c0c [2021-05-02 20:56:39,814 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:56:39,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c [2021-05-02 20:56:39,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ae942644/78f9e208cd65495787a30f982c7bf6ef/FLAG0aced7c0c [2021-05-02 20:56:40,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ae942644/78f9e208cd65495787a30f982c7bf6ef [2021-05-02 20:56:40,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:56:40,224 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:56:40,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:56:40,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:56:40,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:56:40,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:56:40" (1/1) ... [2021-05-02 20:56:40,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@979bde7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:40, skipping insertion in model container [2021-05-02 20:56:40,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:56:40" (1/1) ... [2021-05-02 20:56:40,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:56:40,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:56:40,398 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/hard-ll_valuebound50.c[546,559] [2021-05-02 20:56:40,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:56:40,431 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:56:40,446 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/hard-ll_valuebound50.c[546,559] [2021-05-02 20:56:40,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:56:40,478 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:56:40,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:40 WrapperNode [2021-05-02 20:56:40,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:56:40,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:56:40,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:56:40,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:56:40,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:40" (1/1) ... [2021-05-02 20:56:40,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:40" (1/1) ... [2021-05-02 20:56:40,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:40" (1/1) ... [2021-05-02 20:56:40,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:40" (1/1) ... [2021-05-02 20:56:40,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:40" (1/1) ... [2021-05-02 20:56:40,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:40" (1/1) ... [2021-05-02 20:56:40,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:40" (1/1) ... [2021-05-02 20:56:40,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:56:40,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:56:40,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:56:40,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:56:40,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:40" (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 20:56:40,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:56:40,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:56:40,639 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:56:40,640 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:56:40,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:56:40,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:56:40,640 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:56:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:56:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:56:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:56:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:56:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:56:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:56:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:56:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:56:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:56:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:56:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:56:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:56:40,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:56:40,850 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:56:40,851 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:56:40,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:56:40 BoogieIcfgContainer [2021-05-02 20:56:40,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:56:40,853 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:56:40,853 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:56:40,854 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:56:40,856 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:56:40" (1/1) ... [2021-05-02 20:56:40,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:56:40 BasicIcfg [2021-05-02 20:56:40,872 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:56:40,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:56:40,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:56:40,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:56:40,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:56:40" (1/4) ... [2021-05-02 20:56:40,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2b2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:56:40, skipping insertion in model container [2021-05-02 20:56:40,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:40" (2/4) ... [2021-05-02 20:56:40,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2b2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:56:40, skipping insertion in model container [2021-05-02 20:56:40,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:56:40" (3/4) ... [2021-05-02 20:56:40,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2b2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:56:40, skipping insertion in model container [2021-05-02 20:56:40,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:56:40" (4/4) ... [2021-05-02 20:56:40,878 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound50.cJordan [2021-05-02 20:56:40,882 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:56:40,885 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:56:40,898 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:56:40,929 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:56:40,929 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:56:40,929 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:56:40,929 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:56:40,929 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:56:40,930 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:56:40,930 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:56:40,930 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:56:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:56:40,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:56:40,960 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:40,960 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:40,961 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:40,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-02 20:56:40,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:40,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165519138] [2021-05-02 20:56:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:56:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:56:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:56:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:56:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:56:41,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:41,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165519138] [2021-05-02 20:56:41,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165519138] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:41,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:41,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:56:41,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126379817] [2021-05-02 20:56:41,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:56:41,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:41,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:56:41,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:56:41,296 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:56:41,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:41,412 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:56:41,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:56:41,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 20:56:41,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:41,419 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:56:41,420 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:56:41,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:56:41,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:56:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:56:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:56:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 20:56:41,452 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 20:56:41,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:41,453 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 20:56:41,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:56:41,453 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 20:56:41,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:56:41,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:41,454 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:41,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:56:41,455 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:41,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-02 20:56:41,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:41,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122079975] [2021-05-02 20:56:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:56:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:56:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:56:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:56:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:56:41,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:41,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122079975] [2021-05-02 20:56:41,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122079975] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:41,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:41,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:56:41,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189004872] [2021-05-02 20:56:41,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:56:41,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:41,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:56:41,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:41,612 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 20:56:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:41,883 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-02 20:56:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:56:41,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-02 20:56:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:41,885 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:56:41,885 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:56:41,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:56:41,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:56:41,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:56:41,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:56:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:56:41,893 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 20:56:41,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:41,894 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:56:41,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 20:56:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:56:41,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:56:41,895 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:41,895 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:41,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:56:41,895 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:41,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:41,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-02 20:56:41,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:41,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872178454] [2021-05-02 20:56:41,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:56:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:56:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:56:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:56:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 20:56:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:56:41,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:41,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872178454] [2021-05-02 20:56:41,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872178454] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:41,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:41,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:56:41,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475812849] [2021-05-02 20:56:41,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:56:41,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:41,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:56:41,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:41,997 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:56:42,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:42,301 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 20:56:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:56:42,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:56:42,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:42,304 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:56:42,304 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:56:42,304 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:56:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:56:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 20:56:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:56:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 20:56:42,318 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 20:56:42,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:42,319 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 20:56:42,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:56:42,319 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 20:56:42,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:56:42,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:42,321 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:42,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 20:56:42,322 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:42,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-02 20:56:42,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:42,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948497922] [2021-05-02 20:56:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:42,348 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:42,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780827097] [2021-05-02 20:56:42,348 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 20:56:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:42,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:56:42,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 20:56:42,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948497922] [2021-05-02 20:56:42,583 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780827097] [2021-05-02 20:56:42,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780827097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:42,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:42,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:56:42,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645819387] [2021-05-02 20:56:42,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:56:42,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:42,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:56:42,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:56:42,585 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:56:42,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:42,726 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-05-02 20:56:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:56:42,727 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-02 20:56:42,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:42,728 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:56:42,728 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 20:56:42,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:56:42,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 20:56:42,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 20:56:42,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:56:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-05-02 20:56:42,734 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 38 [2021-05-02 20:56:42,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:42,734 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-05-02 20:56:42,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:56:42,735 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-05-02 20:56:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:56:42,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:42,736 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:42,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:42,950 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:42,951 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-02 20:56:42,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:42,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533295733] [2021-05-02 20:56:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:42,959 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:42,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616282920] [2021-05-02 20:56:42,960 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 20:56:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:43,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:56:43,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:43,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 20:56:43,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:43,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533295733] [2021-05-02 20:56:43,406 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:43,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616282920] [2021-05-02 20:56:43,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616282920] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:43,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:43,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 20:56:43,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370376783] [2021-05-02 20:56:43,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:56:43,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:43,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:56:43,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:56:43,413 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:56:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:43,581 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-02 20:56:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:56:43,582 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 20:56:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:43,583 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:56:43,583 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:56:43,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:56:43,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:56:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:56:43,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:56:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:56:43,588 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-02 20:56:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:43,588 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:56:43,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:56:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:56:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:56:43,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:43,590 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:43,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:43,803 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:43,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:43,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-02 20:56:43,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:43,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272959416] [2021-05-02 20:56:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:43,811 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:43,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872366952] [2021-05-02 20:56:43,811 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 20:56:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:43,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:56:43,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:43,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:43,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 20:56:44,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:44,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272959416] [2021-05-02 20:56:44,122 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:44,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872366952] [2021-05-02 20:56:44,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872366952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:44,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:44,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:56:44,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453018894] [2021-05-02 20:56:44,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:56:44,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:44,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:56:44,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:56:44,124 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:56:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:44,415 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-05-02 20:56:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:56:44,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 20:56:44,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:44,417 INFO L225 Difference]: With dead ends: 82 [2021-05-02 20:56:44,417 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 20:56:44,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:56:44,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 20:56:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 20:56:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 20:56:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2021-05-02 20:56:44,425 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 55 [2021-05-02 20:56:44,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:44,426 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2021-05-02 20:56:44,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:56:44,426 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2021-05-02 20:56:44,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 20:56:44,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:44,427 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:44,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:44,637 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:44,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:44,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1292294975, now seen corresponding path program 1 times [2021-05-02 20:56:44,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:44,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134648370] [2021-05-02 20:56:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:44,649 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:44,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813394898] [2021-05-02 20:56:44,649 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 20:56:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:44,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:56:44,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:44,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:44,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 20:56:45,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:45,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134648370] [2021-05-02 20:56:45,231 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:45,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813394898] [2021-05-02 20:56:45,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813394898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:45,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:45,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:56:45,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258098990] [2021-05-02 20:56:45,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:56:45,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:45,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:56:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:56:45,232 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:56:45,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:45,550 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-05-02 20:56:45,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:56:45,551 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-02 20:56:45,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:45,552 INFO L225 Difference]: With dead ends: 89 [2021-05-02 20:56:45,552 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 20:56:45,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:56:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 20:56:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 20:56:45,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:56:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-05-02 20:56:45,559 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 62 [2021-05-02 20:56:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:45,559 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-05-02 20:56:45,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:56:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-05-02 20:56:45,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:56:45,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:45,561 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:45,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:45,777 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:45,777 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-02 20:56:45,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:45,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794148248] [2021-05-02 20:56:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:45,785 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:45,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548615344] [2021-05-02 20:56:45,786 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 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 20:56:45,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:56:45,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:56:45,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:56:45,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:45,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 20:56:46,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:46,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794148248] [2021-05-02 20:56:46,669 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:46,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548615344] [2021-05-02 20:56:46,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548615344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:46,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:46,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:56:46,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331005149] [2021-05-02 20:56:46,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:56:46,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:46,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:56:46,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:56:46,670 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:56:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:47,111 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2021-05-02 20:56:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:56:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 72 [2021-05-02 20:56:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:47,113 INFO L225 Difference]: With dead ends: 117 [2021-05-02 20:56:47,113 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:56:47,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:56:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:56:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-05-02 20:56:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 72 states have internal predecessors, (79), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 20:56:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2021-05-02 20:56:47,120 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 72 [2021-05-02 20:56:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:47,120 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2021-05-02 20:56:47,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:56:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2021-05-02 20:56:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:56:47,122 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:47,122 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:47,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:56:47,343 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:47,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:47,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-02 20:56:47,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:47,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477056053] [2021-05-02 20:56:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:47,357 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:47,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90996180] [2021-05-02 20:56:47,357 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 20:56:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:47,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:56:47,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:47,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-02 20:56:47,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:47,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477056053] [2021-05-02 20:56:47,773 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:47,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90996180] [2021-05-02 20:56:47,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90996180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:47,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:47,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:56:47,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359610419] [2021-05-02 20:56:47,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:56:47,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:47,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:56:47,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:56:47,775 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:56:48,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:48,019 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2021-05-02 20:56:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:56:48,020 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-02 20:56:48,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:48,021 INFO L225 Difference]: With dead ends: 127 [2021-05-02 20:56:48,021 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 20:56:48,021 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:56:48,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 20:56:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-05-02 20:56:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 76 states have (on average 1.144736842105263) internal successors, (87), 78 states have internal predecessors, (87), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 20:56:48,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 20:56:48,027 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 75 [2021-05-02 20:56:48,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:48,028 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 20:56:48,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:56:48,028 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 20:56:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:56:48,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:48,029 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:48,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:48,252 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:48,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1714864424, now seen corresponding path program 2 times [2021-05-02 20:56:48,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:48,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30728328] [2021-05-02 20:56:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:48,266 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:48,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057131142] [2021-05-02 20:56:48,267 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 20:56:48,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:56:48,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:56:48,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:56:48,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:48,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 20:56:48,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:48,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30728328] [2021-05-02 20:56:48,590 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:48,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057131142] [2021-05-02 20:56:48,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057131142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:48,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:48,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:56:48,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125146641] [2021-05-02 20:56:48,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:56:48,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:48,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:56:48,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:56:48,592 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:56:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:48,755 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2021-05-02 20:56:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:56:48,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 79 [2021-05-02 20:56:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:48,756 INFO L225 Difference]: With dead ends: 136 [2021-05-02 20:56:48,756 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 20:56:48,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:56:48,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 20:56:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-05-02 20:56:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 82 states have (on average 1.146341463414634) internal successors, (94), 84 states have internal predecessors, (94), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 20:56:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2021-05-02 20:56:48,762 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 79 [2021-05-02 20:56:48,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:48,763 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2021-05-02 20:56:48,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:56:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2021-05-02 20:56:48,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:56:48,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:48,765 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:48,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:56:48,988 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:48,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:48,988 INFO L82 PathProgramCache]: Analyzing trace with hash 915008698, now seen corresponding path program 2 times [2021-05-02 20:56:48,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:48,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229071323] [2021-05-02 20:56:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:48,999 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:48,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618757870] [2021-05-02 20:56:48,999 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 20:56:49,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:56:49,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:56:49,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:56:49,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:49,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-02 20:56:49,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:49,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229071323] [2021-05-02 20:56:49,363 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:49,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618757870] [2021-05-02 20:56:49,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618757870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:49,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:49,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:56:49,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955291068] [2021-05-02 20:56:49,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:56:49,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:49,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:56:49,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:56:49,365 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:56:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:49,533 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2021-05-02 20:56:49,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:56:49,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-02 20:56:49,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:49,536 INFO L225 Difference]: With dead ends: 139 [2021-05-02 20:56:49,536 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 20:56:49,536 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:56:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 20:56:49,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-05-02 20:56:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 84 states have (on average 1.119047619047619) internal successors, (94), 87 states have internal predecessors, (94), 35 states have call successors, (35), 19 states have call predecessors, (35), 18 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 20:56:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2021-05-02 20:56:49,545 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 80 [2021-05-02 20:56:49,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:49,545 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2021-05-02 20:56:49,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:56:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2021-05-02 20:56:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 20:56:49,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:49,547 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:49,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 20:56:49,761 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:49,761 INFO L82 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2021-05-02 20:56:49,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:49,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933725374] [2021-05-02 20:56:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:49,767 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:49,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629824609] [2021-05-02 20:56:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:49,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:56:49,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:49,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:49,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,534 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-02 20:56:50,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:50,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-05-02 20:56:51,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:51,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933725374] [2021-05-02 20:56:51,222 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:51,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629824609] [2021-05-02 20:56:51,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629824609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:51,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:51,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:56:51,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729975770] [2021-05-02 20:56:51,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:56:51,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:51,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:56:51,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:56:51,224 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 20:56:53,879 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 20:56:53,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:53,969 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2021-05-02 20:56:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:56:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2021-05-02 20:56:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:53,970 INFO L225 Difference]: With dead ends: 142 [2021-05-02 20:56:53,970 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 20:56:53,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 766.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:56:53,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 20:56:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 20:56:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 69 states have internal predecessors, (76), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 20:56:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-05-02 20:56:53,975 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 86 [2021-05-02 20:56:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:53,975 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-05-02 20:56:53,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 20:56:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-05-02 20:56:53,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:56:53,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:53,976 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:54,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 20:56:54,177 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:54,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:54,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1101138899, now seen corresponding path program 3 times [2021-05-02 20:56:54,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:54,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571833413] [2021-05-02 20:56:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:54,183 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:54,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768588981] [2021-05-02 20:56:54,184 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 20:56:54,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:56:54,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:56:54,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:56:54,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:56,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 82 proven. 8 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-05-02 20:56:56,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:56,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571833413] [2021-05-02 20:56:56,882 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:56,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768588981] [2021-05-02 20:56:56,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768588981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:56,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:56,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:56:56,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688829545] [2021-05-02 20:56:56,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:56:56,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:56,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:56:56,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=68, Unknown=1, NotChecked=0, Total=90 [2021-05-02 20:56:56,883 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:57:21,145 WARN L205 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 20:57:27,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:27,588 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2021-05-02 20:57:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:57:27,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2021-05-02 20:57:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:27,589 INFO L225 Difference]: With dead ends: 125 [2021-05-02 20:57:27,589 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 20:57:27,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 10513.6ms TimeCoverageRelationStatistics Valid=38, Invalid=116, Unknown=2, NotChecked=0, Total=156 [2021-05-02 20:57:27,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 20:57:27,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-02 20:57:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 77 states have internal predecessors, (83), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 20:57:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2021-05-02 20:57:27,594 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 89 [2021-05-02 20:57:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:27,594 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2021-05-02 20:57:27,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:57:27,595 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2021-05-02 20:57:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:57:27,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:27,596 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:27,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:27,806 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:27,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:27,807 INFO L82 PathProgramCache]: Analyzing trace with hash 632527946, now seen corresponding path program 3 times [2021-05-02 20:57:27,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:27,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354227983] [2021-05-02 20:57:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:27,813 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:27,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927595976] [2021-05-02 20:57:27,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:27,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:57:27,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:57:27,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:57:27,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:27,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:27,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:27,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:27,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:27,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:27,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 42 proven. 33 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 20:57:28,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:28,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354227983] [2021-05-02 20:57:28,253 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:28,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927595976] [2021-05-02 20:57:28,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927595976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:28,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:28,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:57:28,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164893282] [2021-05-02 20:57:28,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:57:28,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:28,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:57:28,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:57:28,258 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-02 20:57:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:28,695 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2021-05-02 20:57:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:57:28,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 92 [2021-05-02 20:57:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:28,696 INFO L225 Difference]: With dead ends: 143 [2021-05-02 20:57:28,696 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 20:57:28,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:57:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 20:57:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2021-05-02 20:57:28,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 87 states have internal predecessors, (95), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 20:57:28,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-05-02 20:57:28,701 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 92 [2021-05-02 20:57:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:28,701 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-05-02 20:57:28,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-02 20:57:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-05-02 20:57:28,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:57:28,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:28,703 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:28,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 20:57:28,919 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:28,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1701706771, now seen corresponding path program 4 times [2021-05-02 20:57:28,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:28,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919442498] [2021-05-02 20:57:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:28,929 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:28,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222779152] [2021-05-02 20:57:28,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:28,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:57:28,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:57:28,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:57:29,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:29,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-05-02 20:57:29,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:29,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919442498] [2021-05-02 20:57:29,463 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:29,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222779152] [2021-05-02 20:57:29,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222779152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:29,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:29,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:57:29,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342347803] [2021-05-02 20:57:29,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:57:29,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:29,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:57:29,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:57:29,464 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 20:57:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:29,902 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2021-05-02 20:57:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:57:29,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 97 [2021-05-02 20:57:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:29,903 INFO L225 Difference]: With dead ends: 145 [2021-05-02 20:57:29,903 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 20:57:29,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:57:29,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 20:57:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 20:57:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 92 states have internal predecessors, (100), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 20:57:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2021-05-02 20:57:29,914 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 97 [2021-05-02 20:57:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:29,917 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2021-05-02 20:57:29,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 20:57:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2021-05-02 20:57:29,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:57:29,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:29,919 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:30,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 20:57:30,140 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:30,141 INFO L82 PathProgramCache]: Analyzing trace with hash -317970408, now seen corresponding path program 5 times [2021-05-02 20:57:30,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:30,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453612532] [2021-05-02 20:57:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:30,150 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:30,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771759455] [2021-05-02 20:57:30,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:30,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 20:57:30,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:57:30,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 20:57:30,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:30,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 52 proven. 40 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-05-02 20:57:30,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:30,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453612532] [2021-05-02 20:57:30,934 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:30,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771759455] [2021-05-02 20:57:30,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771759455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:30,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:30,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:57:30,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508289512] [2021-05-02 20:57:30,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:57:30,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:30,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:57:30,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:57:30,935 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 20:57:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:31,499 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2021-05-02 20:57:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:57:31,500 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-02 20:57:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:31,501 INFO L225 Difference]: With dead ends: 158 [2021-05-02 20:57:31,501 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 20:57:31,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:57:31,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 20:57:31,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-05-02 20:57:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 96 states have internal predecessors, (104), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 20:57:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2021-05-02 20:57:31,506 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 105 [2021-05-02 20:57:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:31,506 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2021-05-02 20:57:31,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 20:57:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2021-05-02 20:57:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:57:31,507 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:31,507 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:31,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 20:57:31,721 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:31,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:31,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1162442279, now seen corresponding path program 1 times [2021-05-02 20:57:31,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:31,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584982201] [2021-05-02 20:57:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:31,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:31,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286121377] [2021-05-02 20:57:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:31,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:57:31,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:31,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:31,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:28,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:28,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584982201] [2021-05-02 21:00:28,424 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:00:28,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286121377] [2021-05-02 21:00:28,424 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 21:00:29,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:00:29,144 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NegativeArraySizeException: -1239324874 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildDualFiniteJunction(DualJunctionTir.java:651) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildCorrespondingFiniteJunctionForAntiDer(DualJunctionTir.java:615) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildBoundConstraint(DualJunctionTir.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateConjuncts(DualJunctionTir.java:205) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne(DualJunctionTir.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryExhaustivelyToEliminate(DualJunctionTir.java:125) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminate(DualJunctionTir.java:112) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:465) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-02 21:00:29,146 INFO L168 Benchmark]: Toolchain (without parser) took 228922.79 ms. Allocated memory was 176.2 MB in the beginning and 6.5 GB in the end (delta: 6.4 GB). Free memory was 141.7 MB in the beginning and 5.7 GB in the end (delta: -5.6 GB). Peak memory consumption was 4.3 GB. Max. memory is 8.0 GB. [2021-05-02 21:00:29,147 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 176.2 MB. Free memory is still 158.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 21:00:29,147 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.57 ms. Allocated memory is still 176.2 MB. Free memory was 141.5 MB in the beginning and 131.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 21:00:29,147 INFO L168 Benchmark]: Boogie Preprocessor took 81.36 ms. Allocated memory is still 176.2 MB. Free memory was 131.6 MB in the beginning and 159.8 MB in the end (delta: -28.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 21:00:29,147 INFO L168 Benchmark]: RCFGBuilder took 289.86 ms. Allocated memory is still 176.2 MB. Free memory was 159.8 MB in the beginning and 144.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 21:00:29,147 INFO L168 Benchmark]: IcfgTransformer took 19.15 ms. Allocated memory is still 176.2 MB. Free memory was 144.1 MB in the beginning and 143.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 21:00:29,147 INFO L168 Benchmark]: TraceAbstraction took 228272.86 ms. Allocated memory was 176.2 MB in the beginning and 6.5 GB in the end (delta: 6.4 GB). Free memory was 142.4 MB in the beginning and 5.7 GB in the end (delta: -5.6 GB). Peak memory consumption was 4.3 GB. Max. memory is 8.0 GB. [2021-05-02 21:00:29,148 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 176.2 MB. Free memory is still 158.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.57 ms. Allocated memory is still 176.2 MB. Free memory was 141.5 MB in the beginning and 131.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 81.36 ms. Allocated memory is still 176.2 MB. Free memory was 131.6 MB in the beginning and 159.8 MB in the end (delta: -28.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 289.86 ms. Allocated memory is still 176.2 MB. Free memory was 159.8 MB in the beginning and 144.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 19.15 ms. Allocated memory is still 176.2 MB. Free memory was 144.1 MB in the beginning and 143.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 228272.86 ms. Allocated memory was 176.2 MB in the beginning and 6.5 GB in the end (delta: 6.4 GB). Free memory was 142.4 MB in the beginning and 5.7 GB in the end (delta: -5.6 GB). Peak memory consumption was 4.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NegativeArraySizeException: -1239324874 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NegativeArraySizeException: -1239324874: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildDualFiniteJunction(DualJunctionTir.java:651) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...