/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:54:31,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:54:31,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:54:32,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:54:32,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:54:32,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:54:32,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:54:32,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:54:32,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:54:32,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:54:32,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:54:32,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:54:32,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:54:32,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:54:32,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:54:32,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:54:32,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:54:32,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:54:32,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:54:32,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:54:32,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:54:32,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:54:32,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:54:32,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:54:32,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:54:32,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:54:32,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:54:32,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:54:32,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:54:32,106 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:54:32,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:54:32,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:54:32,109 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:54:32,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:54:32,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:54:32,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:54:32,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:54:32,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:54:32,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:54:32,111 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:54:32,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:54:32,112 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:54:32,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:54:32,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:54:32,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:54:32,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:54:32,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:54:32,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:54:32,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:54:32,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:54:32,114 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:54:32,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:54:32,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:54:32,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:54:32,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:54:32,508 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:54:32,508 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:54:32,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c [2021-05-02 20:54:32,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e3e9707f/e1780bbc2bc3490db7c45ec93ce743dc/FLAG2913b8c9b [2021-05-02 20:54:33,038 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:54:33,038 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c [2021-05-02 20:54:33,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e3e9707f/e1780bbc2bc3490db7c45ec93ce743dc/FLAG2913b8c9b [2021-05-02 20:54:33,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e3e9707f/e1780bbc2bc3490db7c45ec93ce743dc [2021-05-02 20:54:33,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:54:33,424 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:54:33,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:54:33,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:54:33,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:54:33,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:54:33" (1/1) ... [2021-05-02 20:54:33,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33f213dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:54:33, skipping insertion in model container [2021-05-02 20:54:33,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:54:33" (1/1) ... [2021-05-02 20:54:33,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:54:33,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:54:33,586 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_valuebound20.c[546,559] [2021-05-02 20:54:33,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:54:33,611 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:54:33,621 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_valuebound20.c[546,559] [2021-05-02 20:54:33,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:54:33,639 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:54:33,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:54:33 WrapperNode [2021-05-02 20:54:33,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:54:33,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:54:33,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:54:33,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:54:33,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:54:33" (1/1) ... [2021-05-02 20:54:33,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:54:33" (1/1) ... [2021-05-02 20:54:33,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:54:33" (1/1) ... [2021-05-02 20:54:33,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:54:33" (1/1) ... [2021-05-02 20:54:33,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:54:33" (1/1) ... [2021-05-02 20:54:33,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:54:33" (1/1) ... [2021-05-02 20:54:33,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:54:33" (1/1) ... [2021-05-02 20:54:33,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:54:33,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:54:33,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:54:33,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:54:33,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:54:33" (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 20:54:33,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:54:33,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:54:33,801 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:54:33,801 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:54:33,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:54:33,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:54:33,801 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:54:33,801 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:54:33,802 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:54:33,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:54:33,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:54:33,802 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:54:33,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:54:33,803 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:54:33,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:54:33,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:54:33,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:54:33,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:54:33,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:54:33,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:54:34,110 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:54:34,110 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:54:34,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:54:34 BoogieIcfgContainer [2021-05-02 20:54:34,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:54:34,112 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:54:34,112 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:54:34,118 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:54:34,120 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:54:34" (1/1) ... [2021-05-02 20:54:34,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:54:34 BasicIcfg [2021-05-02 20:54:34,143 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:54:34,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:54:34,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:54:34,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:54:34,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:54:33" (1/4) ... [2021-05-02 20:54:34,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe45a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:54:34, skipping insertion in model container [2021-05-02 20:54:34,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:54:33" (2/4) ... [2021-05-02 20:54:34,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe45a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:54:34, skipping insertion in model container [2021-05-02 20:54:34,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:54:34" (3/4) ... [2021-05-02 20:54:34,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe45a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:54:34, skipping insertion in model container [2021-05-02 20:54:34,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:54:34" (4/4) ... [2021-05-02 20:54:34,153 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound20.cJordan [2021-05-02 20:54:34,158 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:54:34,162 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:54:34,177 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:54:34,200 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:54:34,200 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:54:34,200 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:54:34,201 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:54:34,201 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:54:34,201 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:54:34,201 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:54:34,202 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:54:34,219 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 20:54:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:54:34,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:34,227 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 20:54:34,228 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:34,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:34,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-02 20:54:34,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:34,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628591419] [2021-05-02 20:54:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:34,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:54:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:34,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:54:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:34,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:54:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:34,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:54:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:34,537 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 20:54:34,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:54:34,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628591419] [2021-05-02 20:54:34,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628591419] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:54:34,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:54:34,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:54:34,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468411570] [2021-05-02 20:54:34,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:54:34,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:54:34,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:54:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:54:34,559 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 20:54:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:54:34,711 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:54:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:54:34,713 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 20:54:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:54:34,719 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:54:34,719 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:54:34,720 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:54:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:54:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:54:34,747 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 20:54:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 20:54:34,750 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 20:54:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:54:34,750 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 20:54:34,750 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 20:54:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 20:54:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:54:34,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:34,752 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 20:54:34,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:54:34,752 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:34,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:34,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-02 20:54:34,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:34,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542746598] [2021-05-02 20:54:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:34,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:54:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:34,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:54:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:34,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:54:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:34,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:54:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:34,870 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 20:54:34,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:54:34,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542746598] [2021-05-02 20:54:34,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542746598] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:54:34,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:54:34,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:54:34,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261269874] [2021-05-02 20:54:34,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:54:34,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:54:34,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:54:34,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:54:34,873 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 20:54:35,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:54:35,112 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-02 20:54:35,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:54:35,113 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 20:54:35,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:54:35,114 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:54:35,114 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:54:35,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:54:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:54:35,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:54:35,121 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 20:54:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:54:35,122 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 20:54:35,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:54:35,123 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:54:35,123 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 20:54:35,123 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:54:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:54:35,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:35,124 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 20:54:35,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:54:35,124 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-02 20:54:35,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:35,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901181383] [2021-05-02 20:54:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:35,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:54:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:35,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:54:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:35,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:54:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:35,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:54:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:35,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 20:54:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:35,213 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 20:54:35,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:54:35,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901181383] [2021-05-02 20:54:35,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901181383] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:54:35,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:54:35,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:54:35,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279639751] [2021-05-02 20:54:35,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:54:35,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:54:35,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:54:35,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:54:35,215 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 20:54:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:54:35,509 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 20:54:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:54:35,509 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 20:54:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:54:35,511 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:54:35,511 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:54:35,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:54:35,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:54:35,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 20:54:35,524 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 20:54:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 20:54:35,527 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 20:54:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:54:35,527 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 20:54:35,528 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 20:54:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 20:54:35,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:54:35,530 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:35,530 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 20:54:35,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 20:54:35,530 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:35,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-02 20:54:35,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:35,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766005020] [2021-05-02 20:54:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:35,562 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:54:35,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359069077] [2021-05-02 20:54:35,562 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 20:54:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:35,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:54:35,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:54:35,831 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 20:54:35,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:54:35,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766005020] [2021-05-02 20:54:35,832 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:54:35,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359069077] [2021-05-02 20:54:35,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359069077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:54:35,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:54:35,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:54:35,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803161861] [2021-05-02 20:54:35,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:54:35,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:54:35,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:54:35,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:54:35,834 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 20:54:35,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:54:35,981 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-05-02 20:54:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:54:35,981 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 20:54:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:54:35,983 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:54:35,983 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 20:54:35,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:54:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 20:54:35,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 20:54:35,990 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 20:54:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-05-02 20:54:35,993 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 38 [2021-05-02 20:54:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:54:35,994 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-05-02 20:54:35,994 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 20:54:35,994 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-05-02 20:54:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:54:35,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:35,996 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 20:54:36,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:54:36,219 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:36,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:36,220 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-02 20:54:36,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:36,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166621208] [2021-05-02 20:54:36,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:36,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:54:36,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093995246] [2021-05-02 20:54:36,229 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 20:54:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:36,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:54:36,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:54:36,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:36,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:36,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:36,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:36,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:36,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:36,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:36,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:36,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:36,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:36,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:36,593 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 20:54:36,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:54:36,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166621208] [2021-05-02 20:54:36,594 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:54:36,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093995246] [2021-05-02 20:54:36,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093995246] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:54:36,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:54:36,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 20:54:36,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308645540] [2021-05-02 20:54:36,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:54:36,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:54:36,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:54:36,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:54:36,602 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 20:54:36,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:54:36,762 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-02 20:54:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:54:36,762 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 20:54:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:54:36,766 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:54:36,767 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:54:36,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:54:36,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:54:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:54:36,781 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 20:54:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:54:36,782 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-02 20:54:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:54:36,782 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:54:36,782 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 20:54:36,783 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:54:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:54:36,783 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:36,783 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 20:54:37,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:54:37,009 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:37,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:37,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-02 20:54:37,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:37,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655116654] [2021-05-02 20:54:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:37,017 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:54:37,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260135030] [2021-05-02 20:54:37,018 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 20:54:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:37,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:54:37,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:54:37,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,268 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 20:54:37,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:54:37,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655116654] [2021-05-02 20:54:37,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:54:37,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260135030] [2021-05-02 20:54:37,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260135030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:54:37,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:54:37,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:54:37,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683268143] [2021-05-02 20:54:37,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:54:37,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:54:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:54:37,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:54:37,271 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 20:54:37,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:54:37,561 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-05-02 20:54:37,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:54:37,561 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 20:54:37,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:54:37,563 INFO L225 Difference]: With dead ends: 82 [2021-05-02 20:54:37,563 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 20:54:37,563 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:54:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 20:54:37,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 20:54:37,568 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 20:54:37,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2021-05-02 20:54:37,569 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 55 [2021-05-02 20:54:37,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:54:37,570 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2021-05-02 20:54:37,570 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 20:54:37,570 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2021-05-02 20:54:37,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 20:54:37,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:37,571 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 20:54:37,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:54:37,792 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:37,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1292294975, now seen corresponding path program 1 times [2021-05-02 20:54:37,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:37,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219582516] [2021-05-02 20:54:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:37,800 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:54:37,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121404661] [2021-05-02 20:54:37,801 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 20:54:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:37,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:54:37,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:54:37,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:37,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,310 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 20:54:38,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:54:38,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219582516] [2021-05-02 20:54:38,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:54:38,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121404661] [2021-05-02 20:54:38,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121404661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:54:38,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:54:38,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:54:38,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157734140] [2021-05-02 20:54:38,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:54:38,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:54:38,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:54:38,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:54:38,313 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 20:54:38,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:54:38,614 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-05-02 20:54:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:54:38,614 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 20:54:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:54:38,618 INFO L225 Difference]: With dead ends: 89 [2021-05-02 20:54:38,618 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 20:54:38,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:54:38,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 20:54:38,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 20:54:38,636 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 20:54:38,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-05-02 20:54:38,637 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 62 [2021-05-02 20:54:38,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:54:38,637 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-05-02 20:54:38,637 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 20:54:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-05-02 20:54:38,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:54:38,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:38,638 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 20:54:38,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:54:38,839 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-02 20:54:38,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:38,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036655940] [2021-05-02 20:54:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:38,849 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:54:38,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159760934] [2021-05-02 20:54:38,850 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 20:54:38,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:54:38,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:54:38,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:54:38,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:54:38,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:38,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:39,738 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 20:54:39,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:54:39,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036655940] [2021-05-02 20:54:39,738 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:54:39,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159760934] [2021-05-02 20:54:39,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159760934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:54:39,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:54:39,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:54:39,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746472288] [2021-05-02 20:54:39,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:54:39,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:54:39,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:54:39,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:54:39,740 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 20:54:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:54:40,234 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2021-05-02 20:54:40,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:54:40,234 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 20:54:40,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:54:40,235 INFO L225 Difference]: With dead ends: 117 [2021-05-02 20:54:40,235 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:54:40,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:54:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:54:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-05-02 20:54:40,241 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 20:54:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2021-05-02 20:54:40,242 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 72 [2021-05-02 20:54:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:54:40,244 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2021-05-02 20:54:40,245 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 20:54:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2021-05-02 20:54:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:54:40,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:40,249 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 20:54:40,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:54:40,465 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:40,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-02 20:54:40,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:40,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293935735] [2021-05-02 20:54:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:40,475 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:54:40,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399769186] [2021-05-02 20:54:40,475 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 20:54:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:40,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:54:40,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:54:40,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:40,910 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 20:54:40,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:54:40,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293935735] [2021-05-02 20:54:40,911 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:54:40,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399769186] [2021-05-02 20:54:40,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399769186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:54:40,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:54:40,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:54:40,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438512983] [2021-05-02 20:54:40,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:54:40,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:54:40,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:54:40,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:54:40,913 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 20:54:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:54:41,196 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2021-05-02 20:54:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:54:41,197 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 20:54:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:54:41,200 INFO L225 Difference]: With dead ends: 127 [2021-05-02 20:54:41,200 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 20:54:41,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:54:41,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 20:54:41,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-05-02 20:54:41,216 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 20:54:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 20:54:41,219 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 75 [2021-05-02 20:54:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:54:41,220 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 20:54:41,220 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 20:54:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 20:54:41,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:54:41,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:41,221 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 20:54:41,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:54:41,429 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:41,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1714864424, now seen corresponding path program 2 times [2021-05-02 20:54:41,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:41,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580620303] [2021-05-02 20:54:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:41,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:54:41,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426245339] [2021-05-02 20:54:41,438 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 20:54:41,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:54:41,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:54:41,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:54:41,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:54:41,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:41,791 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 20:54:41,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:54:41,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580620303] [2021-05-02 20:54:41,792 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:54:41,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426245339] [2021-05-02 20:54:41,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426245339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:54:41,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:54:41,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:54:41,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695254963] [2021-05-02 20:54:41,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:54:41,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:54:41,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:54:41,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:54:41,795 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 20:54:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:54:41,965 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2021-05-02 20:54:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:54:41,965 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 20:54:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:54:41,967 INFO L225 Difference]: With dead ends: 136 [2021-05-02 20:54:41,967 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 20:54:41,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:54:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 20:54:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-05-02 20:54:41,975 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 20:54:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2021-05-02 20:54:41,976 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 79 [2021-05-02 20:54:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:54:41,977 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2021-05-02 20:54:41,977 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 20:54:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2021-05-02 20:54:41,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:54:41,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:41,981 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 20:54:42,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:54:42,197 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:42,198 INFO L82 PathProgramCache]: Analyzing trace with hash 915008698, now seen corresponding path program 2 times [2021-05-02 20:54:42,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:42,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811681870] [2021-05-02 20:54:42,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:42,206 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:54:42,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434559842] [2021-05-02 20:54:42,206 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 20:54:42,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:54:42,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:54:42,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:54:42,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:54:42,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:42,611 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 20:54:42,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:54:42,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811681870] [2021-05-02 20:54:42,612 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:54:42,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434559842] [2021-05-02 20:54:42,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434559842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:54:42,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:54:42,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:54:42,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959468963] [2021-05-02 20:54:42,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:54:42,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:54:42,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:54:42,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:54:42,613 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 20:54:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:54:42,785 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2021-05-02 20:54:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:54:42,786 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 20:54:42,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:54:42,788 INFO L225 Difference]: With dead ends: 139 [2021-05-02 20:54:42,788 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 20:54:42,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:54:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 20:54:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-05-02 20:54:42,793 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 20:54:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2021-05-02 20:54:42,794 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 80 [2021-05-02 20:54:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:54:42,795 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2021-05-02 20:54:42,795 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 20:54:42,795 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2021-05-02 20:54:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 20:54:42,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:42,796 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 20:54:43,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 20:54:43,005 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:43,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:43,005 INFO L82 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2021-05-02 20:54:43,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:43,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883652968] [2021-05-02 20:54:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:43,012 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:54:43,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590509479] [2021-05-02 20:54:43,012 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 20:54:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:54:43,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:54:43,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:54:43,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:43,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,786 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-02 20:54:45,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:45,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:46,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:48,524 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 20:54:48,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:54:48,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883652968] [2021-05-02 20:54:48,524 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:54:48,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590509479] [2021-05-02 20:54:48,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590509479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:54:48,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:54:48,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:54:48,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023978697] [2021-05-02 20:54:48,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:54:48,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:54:48,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:54:48,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=229, Unknown=2, NotChecked=0, Total=272 [2021-05-02 20:54:48,526 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 20:54:49,334 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 20:54:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:54:49,417 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2021-05-02 20:54:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:54:49,417 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 20:54:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:54:49,418 INFO L225 Difference]: With dead ends: 142 [2021-05-02 20:54:49,418 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 20:54:49,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 4691.3ms TimeCoverageRelationStatistics Valid=63, Invalid=355, Unknown=2, NotChecked=0, Total=420 [2021-05-02 20:54:49,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 20:54:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 20:54:49,422 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 20:54:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-05-02 20:54:49,423 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 86 [2021-05-02 20:54:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:54:49,423 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-05-02 20:54:49,423 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 20:54:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-05-02 20:54:49,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:54:49,424 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:54:49,424 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 20:54:49,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 20:54:49,637 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:54:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:54:49,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1101138899, now seen corresponding path program 3 times [2021-05-02 20:54:49,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:54:49,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560894664] [2021-05-02 20:54:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:54:49,644 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:54:49,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263160767] [2021-05-02 20:54:49,644 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 20:54:49,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:54:49,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:54:49,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:54:49,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:54:52,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:52,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:54:52,367 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 20:54:52,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:54:52,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560894664] [2021-05-02 20:54:52,367 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:54:52,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263160767] [2021-05-02 20:54:52,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263160767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:54:52,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:54:52,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:54:52,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51893059] [2021-05-02 20:54:52,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:54:52,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:54:52,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:54:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=68, Unknown=1, NotChecked=0, Total=90 [2021-05-02 20:54:52,369 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 20:55:12,654 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 20:55:20,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:55:20,931 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2021-05-02 20:55:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:55:20,933 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 20:55:20,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:55:20,934 INFO L225 Difference]: With dead ends: 125 [2021-05-02 20:55:20,934 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 20:55:20,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 8544.3ms TimeCoverageRelationStatistics Valid=38, Invalid=116, Unknown=2, NotChecked=0, Total=156 [2021-05-02 20:55:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 20:55:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-02 20:55:20,938 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 20:55:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2021-05-02 20:55:20,939 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 89 [2021-05-02 20:55:20,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:55:20,940 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2021-05-02 20:55:20,940 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 20:55:20,940 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2021-05-02 20:55:20,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:55:20,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:55:20,941 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 20:55:21,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:55:21,157 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:55:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:55:21,157 INFO L82 PathProgramCache]: Analyzing trace with hash 632527946, now seen corresponding path program 3 times [2021-05-02 20:55:21,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:55:21,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800913164] [2021-05-02 20:55:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:55:21,173 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:55:21,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74399084] [2021-05-02 20:55:21,173 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 20:55:21,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:55:21,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:55:21,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:55:21,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:55:21,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:21,650 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 20:55:21,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:55:21,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800913164] [2021-05-02 20:55:21,651 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:55:21,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74399084] [2021-05-02 20:55:21,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74399084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:55:21,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:55:21,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:55:21,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540759608] [2021-05-02 20:55:21,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:55:21,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:55:21,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:55:21,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:55:21,659 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 20:55:22,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:55:22,112 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2021-05-02 20:55:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:55:22,112 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 20:55:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:55:22,113 INFO L225 Difference]: With dead ends: 143 [2021-05-02 20:55:22,113 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 20:55:22,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:55:22,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 20:55:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2021-05-02 20:55:22,118 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 20:55:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-05-02 20:55:22,119 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 92 [2021-05-02 20:55:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:55:22,120 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-05-02 20:55:22,120 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 20:55:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-05-02 20:55:22,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:55:22,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:55:22,121 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 20:55:22,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 20:55:22,345 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:55:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:55:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1701706771, now seen corresponding path program 4 times [2021-05-02 20:55:22,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:55:22,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439682537] [2021-05-02 20:55:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:55:22,353 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:55:22,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595803522] [2021-05-02 20:55:22,353 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 20:55:22,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:55:22,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:55:22,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:55:22,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:55:22,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:22,902 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 20:55:22,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:55:22,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439682537] [2021-05-02 20:55:22,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:55:22,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595803522] [2021-05-02 20:55:22,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595803522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:55:22,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:55:22,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:55:22,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199005340] [2021-05-02 20:55:22,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:55:22,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:55:22,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:55:22,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:55:22,905 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 20:55:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:55:23,395 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2021-05-02 20:55:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:55:23,396 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 20:55:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:55:23,396 INFO L225 Difference]: With dead ends: 145 [2021-05-02 20:55:23,396 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 20:55:23,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:55:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 20:55:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 20:55:23,401 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 20:55:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2021-05-02 20:55:23,402 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 97 [2021-05-02 20:55:23,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:55:23,402 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2021-05-02 20:55:23,402 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 20:55:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2021-05-02 20:55:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:55:23,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:55:23,404 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 20:55:23,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 20:55:23,621 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:55:23,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:55:23,621 INFO L82 PathProgramCache]: Analyzing trace with hash -317970408, now seen corresponding path program 5 times [2021-05-02 20:55:23,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:55:23,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151665684] [2021-05-02 20:55:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:55:23,627 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:55:23,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020488186] [2021-05-02 20:55:23,627 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 20:55:23,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 20:55:23,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:55:23,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 20:55:23,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:55:23,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:23,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:24,393 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 20:55:24,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:55:24,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151665684] [2021-05-02 20:55:24,394 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:55:24,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020488186] [2021-05-02 20:55:24,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020488186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:55:24,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:55:24,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:55:24,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685285552] [2021-05-02 20:55:24,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:55:24,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:55:24,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:55:24,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:55:24,395 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 20:55:25,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:55:25,048 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2021-05-02 20:55:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:55:25,049 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 20:55:25,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:55:25,050 INFO L225 Difference]: With dead ends: 158 [2021-05-02 20:55:25,050 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 20:55:25,050 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 339.3ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:55:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 20:55:25,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-05-02 20:55:25,055 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 20:55:25,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2021-05-02 20:55:25,056 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 105 [2021-05-02 20:55:25,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:55:25,056 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2021-05-02 20:55:25,056 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 20:55:25,056 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2021-05-02 20:55:25,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:55:25,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:55:25,057 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 20:55:25,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 20:55:25,258 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:55:25,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:55:25,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1162442279, now seen corresponding path program 1 times [2021-05-02 20:55:25,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:55:25,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410323281] [2021-05-02 20:55:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:55:25,265 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:55:25,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714811497] [2021-05-02 20:55:25,265 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 20:55:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:55:25,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:55:25,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:55:25,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:55:25,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:24,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:58:24,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410323281] [2021-05-02 20:58:24,695 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:58:24,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714811497] [2021-05-02 20:58:24,695 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 20:58:24,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:58:24,905 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 20:58:24,917 INFO L168 Benchmark]: Toolchain (without parser) took 231494.21 ms. Allocated memory was 183.5 MB in the beginning and 7.1 GB in the end (delta: 6.9 GB). Free memory was 149.2 MB in the beginning and 6.1 GB in the end (delta: -5.9 GB). Peak memory consumption was 4.7 GB. Max. memory is 8.0 GB. [2021-05-02 20:58:24,918 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 183.5 MB. Free memory is still 165.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:58:24,918 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.07 ms. Allocated memory is still 183.5 MB. Free memory was 149.0 MB in the beginning and 139.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:24,918 INFO L168 Benchmark]: Boogie Preprocessor took 28.42 ms. Allocated memory is still 183.5 MB. Free memory was 139.2 MB in the beginning and 137.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:24,918 INFO L168 Benchmark]: RCFGBuilder took 441.53 ms. Allocated memory is still 183.5 MB. Free memory was 137.6 MB in the beginning and 152.3 MB in the end (delta: -14.7 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:24,918 INFO L168 Benchmark]: IcfgTransformer took 31.61 ms. Allocated memory is still 183.5 MB. Free memory was 151.8 MB in the beginning and 150.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:58:24,918 INFO L168 Benchmark]: TraceAbstraction took 230772.04 ms. Allocated memory was 183.5 MB in the beginning and 7.1 GB in the end (delta: 6.9 GB). Free memory was 150.2 MB in the beginning and 6.1 GB in the end (delta: -5.9 GB). Peak memory consumption was 4.7 GB. Max. memory is 8.0 GB. [2021-05-02 20:58:24,918 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 183.5 MB. Free memory is still 165.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 209.07 ms. Allocated memory is still 183.5 MB. Free memory was 149.0 MB in the beginning and 139.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.42 ms. Allocated memory is still 183.5 MB. Free memory was 139.2 MB in the beginning and 137.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 441.53 ms. Allocated memory is still 183.5 MB. Free memory was 137.6 MB in the beginning and 152.3 MB in the end (delta: -14.7 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * IcfgTransformer took 31.61 ms. Allocated memory is still 183.5 MB. Free memory was 151.8 MB in the beginning and 150.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 230772.04 ms. Allocated memory was 183.5 MB in the beginning and 7.1 GB in the end (delta: 6.9 GB). Free memory was 150.2 MB in the beginning and 6.1 GB in the end (delta: -5.9 GB). Peak memory consumption was 4.7 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NegativeArraySizeException: -1239324874 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NegativeArraySizeException: -1239324874: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildDualFiniteJunction(DualJunctionTir.java:651) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...